DIXON, R. L.; HARBOUR, G. H. (1959) Coal resources of Trinidad-Aguilar area, Las Animas and Huerfano Counties, Colorado. Bulletin 1072g. US Geological Survey doi:10.3133/b1072g

ⓘ 'Allanite Group'

Formula: (A1²⁺REE³⁺)(M1³⁺M2³⁺M3²⁺)O[Si₂O₇][SiO₄](OH)

Locality: Unnamed locality, Trinidad Area, Las Animas County, Colorado, USA

References:

Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ Alunite

Formula: KAl₃(SO₄)₂(OH)₆

Locality: Booster Station, Purgatory Canyon, Las Animas County, Colorado, USA

References:

Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ Analcime

Formula: Na(AlSi₂O₆) · H₂O

Localities:

Apishapa quadrangle, Las Animas County, Colorado, USA
Aguilar-Apishapa Pass, Las Animas County, Colorado, USA

ⓘ Arsenopyrite

Formula: FeAsS

Locality: Pierre Shale, Trinidad Area, Las Animas County, Colorado, USA

References:

Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ Augite

Formula: (Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆

Locality: Apishapa quadrangle, Las Animas County, Colorado, USA

References:

Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ Baryte

Formula: BaSO₄

Locality: Purgatoire River, Las Animas County, Colorado, USA

References:

Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ Calcite

Formula: CaCO₃

Localities: Reported from at least 7 localities in this region.

ⓘ Carnotite

Formula: K₂(UO₂)₂(VO₄)₂ · 3H₂O

Localities:

Virginia No. 14 Mine, La Veta Mining District, Las Animas County, Colorado, USA
Fan Dyke No. 1 Occurrence, La Veta Mining District, Las Animas County, Colorado, USA

ⓘ Chalcopyrite

Formula: CuFeS₂

Localities:

Little Mattie Lode Occurrence, La Veta Mining District, Las Animas County, Colorado, USA
Monitor Lode Occurrence, La Veta Mining District, Las Animas County, Colorado, USA
Spanish Gold Mine Lode, La Veta Mining District, Las Animas County, Colorado, USA
Uncle Sam Lode Occurrence, La Veta Mining District, Las Animas County, Colorado, USA

ⓘ Euxenite-(Y)

Formula: (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆

Locality: Unnamed locality, Trinidad Area, Las Animas County, Colorado, USA

References:

Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ 'Fayalite-Forsterite Series'

Localities:

Apishapa quadrangle, Las Animas County, Colorado, USA
Wet Canyon, Weston, Las Animas County, Colorado, USA
Mauricio Canyon, Las Animas County, Colorado, USA

ⓘ Galena

Formula: PbS

Localities:

ⓘ Graphite

Formula: C

Localities:

Trinidad Coal Field, Las Animas County, Colorado, USA
El Moro Coal Field, Las Animas County, Colorado, USA

ⓘ Haüyne

Formula: Na₃Ca(Si₃Al₃)O₁₂(SO₄)

Locality: Spanish Peaks Area, Las Animas County, Colorado, USA

References:

Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ 'Heulandite Subgroup'

Formula: (Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O

Locality: Aguilar-Apishapa Pass, Las Animas County, Colorado, USA

References:

Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ 'Hornblende Root Name Group'

Formula: ◻Ca₂(C²⁺₄C³⁺)(AlSi₇O₂₂)W₂

Locality: Apishapa quadrangle, Las Animas County, Colorado, USA

ⓘ Kaolinite

Formula: Al₂(Si₂O₅)(OH)₄

Locality: Trinidad Coal Field, Las Animas County, Colorado, USA

References:

Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ Laumontite

Formula: CaAl₂Si₄O₁₂ · 4H₂O

Locality: Aguilar-Apishapa Pass, Las Animas County, Colorado, USA

References:

Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ 'Limonite'

Localities:

Thatcher, Las Animas County, Colorado, USA
Trinidad Coal Field, Las Animas County, Colorado, USA

ⓘ Marcasite

Formula: FeS₂

Locality: Thatcher, Las Animas County, Colorado, USA

References:

Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ Mordenite

Formula: (Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O

Locality: Aguilar-Apishapa Pass, Las Animas County, Colorado, USA

References:

Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ Native Gold

Formula: Au

Locality: Unnamed Placer (MRDS - 10087878), Spanish Peaks Area, Las Animas County, Colorado, USA

References:

(2005) Mineral Resources Data System (MRDS), US Geological Survey.

ⓘ 'Petrified Wood'

Locality: Morrison Formation, La Junta, Las Animas County, Colorado, USA

References:

Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ 'Plagioclase'

Formula: (Na,Ca)[(Si,Al)AlSi₂]O₈

Locality: Spanish Peaks Area (2), Las Animas County, Colorado, USA

References:

Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ Prehnite

Formula: Ca₂Al₂Si₃O₁₀(OH)₂

Locality: Spanish Peaks Area (2), Las Animas County, Colorado, USA

References:

Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ 'Pumpellyite Subgroup'

Formula: Ca₂XAl₂[Si₂O₆(OH)][SiO₄](OH)₂A

Locality: Spanish Peaks Area (2), Las Animas County, Colorado, USA

References:

Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ Quartz

Formula: SiO₂

Localities: Reported from at least 7 localities in this region.

ⓘ Quartz var. Agate

Formula: SiO₂

Locality: Summit of Range of Animas River, Las Animas County, Colorado, USA

References:

Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ Quartz var. Amethyst

Formula: SiO₂

Locality: Summit of Range of Animas River, Las Animas County, Colorado, USA

References:

Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ Quartz var. Chalcedony

Formula: SiO₂

Locality: Summit of Range of Animas River, Las Animas County, Colorado, USA

References:

Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ Quartz var. Fortification Agate

Formula: SiO₂

Locality: Summit of Range of Animas River, Las Animas County, Colorado, USA

References:

Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ Siderite

Formula: FeCO₃

Localities:

Uncle Sam Lode Occurrence, La Veta Mining District, Las Animas County, Colorado, USA
Little Mattie Lode Occurrence, La Veta Mining District, Las Animas County, Colorado, USA
Monitor Lode Occurrence, La Veta Mining District, Las Animas County, Colorado, USA
Spanish Gold Mine Lode, La Veta Mining District, Las Animas County, Colorado, USA

ⓘ Sphalerite

Formula: ZnS

Localities:

ⓘ 'Stilbite Subgroup'

Formula: M_6-7[Al_8-9Si_27-28O₇₂] · nH₂O

Locality: Aguilar-Apishapa Pass, Las Animas County, Colorado, USA

References:

Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ 'Tetrahedrite Subgroup'

Formula: Cu₆(Cu₄C²⁺₂)Sb₄S₁₂S

Localities:

ⓘ Tyuyamunite

Formula: Ca(UO₂)₂(VO₄)₂ · 5-8H₂O

Locality: Virginia No. 14 Mine, La Veta Mining District, Las Animas County, Colorado, USA

References:

(2005) Mineral Resources Data System (MRDS), US Geological Survey.

ⓘ Vésigniéite

Formula: BaCu₃(VO₄)₂(OH)₂

Locality: Stonewall, Las Animas County, Colorado, USA

References:

Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ Wairakite

Formula: Ca(Al₂Si₄O₁₂) · 2H₂O

Locality: Aguilar-Apishapa Pass, Las Animas County, Colorado, USA

References:

Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Native Gold	1.AA.05	Au
ⓘ	Graphite	1.CB.05a	C
Group 2 - Sulphides and Sulfosalts
ⓘ	Sphalerite	2.CB.05a	ZnS
ⓘ	Chalcopyrite	2.CB.10a	CuFeS₂
ⓘ	Galena	2.CD.10	PbS
ⓘ	Marcasite	2.EB.10a	FeS₂
ⓘ	Arsenopyrite	2.EB.20	FeAsS
ⓘ	'Tetrahedrite Subgroup'	2.GB.05	Cu₆(Cu₄C²⁺₂)Sb₄S₁₂S
Group 4 - Oxides and Hydroxides
ⓘ	Quartz var. Agate	4.DA.05	SiO₂
ⓘ	var. Amethyst	4.DA.05	SiO₂
ⓘ	var. Chalcedony	4.DA.05	SiO₂
ⓘ		4.DA.05	SiO₂
ⓘ	var. Fortification Agate	4.DA.05	SiO₂
ⓘ	Euxenite-(Y)	4.DG.05	(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆
ⓘ	Carnotite	4.HB.05	K₂(UO₂)₂(VO₄)₂ · 3H₂O
ⓘ	Tyuyamunite	4.HB.25	Ca(UO₂)₂(VO₄)₂ · 5-8H₂O
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
ⓘ	Siderite	5.AB.05	FeCO₃
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘ	Baryte	7.AD.35	BaSO₄
ⓘ	Alunite	7.BC.10	KAl₃(SO₄)₂(OH)₆
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Vésigniéite	8.BH.45	BaCu₃(VO₄)₂(OH)₂
Group 9 - Silicates
ⓘ	Augite	9.DA.15	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
ⓘ	Prehnite	9.DP.20	Ca₂Al₂Si₃O₁₀(OH)₂
ⓘ	Kaolinite	9.ED.05	Al₂(Si₂O₅)(OH)₄
ⓘ	Albite	9.FA.35	Na(AlSi₃O₈)
ⓘ	Haüyne	9.FB.10	Na₃Ca(Si₃Al₃)O₁₂(SO₄)
ⓘ	Analcime	9.GB.05	Na(AlSi₂O₆) · H₂O
ⓘ	Wairakite	9.GB.05	Ca(Al₂Si₄O₁₂) · 2H₂O
ⓘ	Laumontite	9.GB.10	CaAl₂Si₄O₁₂ · 4H₂O
ⓘ	Mordenite	9.GD.35	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O
Unclassified
ⓘ	'Heulandite Subgroup'	-	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
ⓘ	'Limonite'	-
ⓘ	'Pumpellyite Subgroup'	-	Ca₂XAl₂[Si₂O₆(OH)][SiO₄](OH)₂A
ⓘ	'Stilbite Subgroup'	-	M_6-7[Al_8-9Si_27-28O₇₂] · nH₂O
ⓘ	'Petrified Wood'	-
ⓘ	'Fayalite-Forsterite Series'	-
ⓘ	'Hornblende Root Name Group'	-	◻Ca₂(C²⁺₄C³⁺)(AlSi₇O₂₂)W₂
ⓘ	'Plagioclase'	-	(Na,Ca)[(Si,Al)AlSi₂]O₈
ⓘ	'Allanite Group'	-	(A1²⁺REE³⁺)(M1³⁺M2³⁺M3²⁺)O[Si₂O₇][SiO₄](OH)

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Alunite	KAl₃(SO₄)₂(OH)₆
H	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
H	ⓘ Carnotite	K₂(UO₂)₂(VO₄)₂ · 3H₂O
H	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
H	ⓘ Kaolinite	Al₂(Si₂O₅)(OH)₄
H	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
H	ⓘ Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O
H	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
H	ⓘ Pumpellyite Subgroup	Ca₂XAl₂[Si₂O₆(OH)][SiO₄](OH)₂A
H	ⓘ Stilbite Subgroup	M_6-7[Al_8-9Si_27-28O₇₂] · nH₂O
H	ⓘ Tyuyamunite	Ca(UO₂)₂(VO₄)₂ · 5-8H₂O
H	ⓘ Vésigniéite	BaCu₃(VO₄)₂(OH)₂
H	ⓘ Wairakite	Ca(Al₂Si₄O₁₂) · 2H₂O
H	ⓘ Allanite Group	(A1²⁺REE³⁺)(M1³⁺M2³⁺M3²⁺)O[Si₂O₇][SiO₄](OH)
C	Carbon
C	ⓘ Calcite	CaCO₃
C	ⓘ Graphite	C
C	ⓘ Siderite	FeCO₃
O	Oxygen
O	ⓘ Quartz var. Agate	SiO₂
O	ⓘ Albite	Na(AlSi₃O₈)
O	ⓘ Alunite	KAl₃(SO₄)₂(OH)₆
O	ⓘ Quartz var. Amethyst	SiO₂
O	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
O	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
O	ⓘ Baryte	BaSO₄
O	ⓘ Calcite	CaCO₃
O	ⓘ Carnotite	K₂(UO₂)₂(VO₄)₂ · 3H₂O
O	ⓘ Quartz var. Chalcedony	SiO₂
O	ⓘ Euxenite-(Y)	(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆
O	ⓘ Haüyne	Na₃Ca(Si₃Al₃)O₁₂(SO₄)
O	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
O	ⓘ Kaolinite	Al₂(Si₂O₅)(OH)₄
O	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
O	ⓘ Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O
O	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
O	ⓘ Pumpellyite Subgroup	Ca₂XAl₂[Si₂O₆(OH)][SiO₄](OH)₂A
O	ⓘ Quartz	SiO₂
O	ⓘ Siderite	FeCO₃
O	ⓘ Stilbite Subgroup	M_6-7[Al_8-9Si_27-28O₇₂] · nH₂O
O	ⓘ Tyuyamunite	Ca(UO₂)₂(VO₄)₂ · 5-8H₂O
O	ⓘ Vésigniéite	BaCu₃(VO₄)₂(OH)₂
O	ⓘ Wairakite	Ca(Al₂Si₄O₁₂) · 2H₂O
O	ⓘ Quartz var. Fortification Agate	SiO₂
O	ⓘ Fayalite-Forsterite Series
O	ⓘ Hornblende Root Name Group	◻Ca₂(C₄²⁺C³⁺)(AlSi₇O₂₂)W₂
O	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
O	ⓘ Allanite Group	(A1²⁺REE³⁺)(M1³⁺M2³⁺M3²⁺)O[Si₂O₇][SiO₄](OH)
Na	Sodium
Na	ⓘ Albite	Na(AlSi₃O₈)
Na	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
Na	ⓘ Haüyne	Na₃Ca(Si₃Al₃)O₁₂(SO₄)
Na	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
Na	ⓘ Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O
Na	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Mg	Magnesium
Mg	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Mg	ⓘ Fayalite-Forsterite Series
Al	Aluminium
Al	ⓘ Albite	Na(AlSi₃O₈)
Al	ⓘ Alunite	KAl₃(SO₄)₂(OH)₆
Al	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
Al	ⓘ Haüyne	Na₃Ca(Si₃Al₃)O₁₂(SO₄)
Al	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
Al	ⓘ Kaolinite	Al₂(Si₂O₅)(OH)₄
Al	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
Al	ⓘ Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O
Al	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
Al	ⓘ Pumpellyite Subgroup	Ca₂XAl₂[Si₂O₆(OH)][SiO₄](OH)₂A
Al	ⓘ Stilbite Subgroup	M_6-7[Al_8-9Si_27-28O₇₂] · nH₂O
Al	ⓘ Wairakite	Ca(Al₂Si₄O₁₂) · 2H₂O
Al	ⓘ Hornblende Root Name Group	◻Ca₂(C₄²⁺C³⁺)(AlSi₇O₂₂)W₂
Al	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	Silicon
Si	ⓘ Quartz var. Agate	SiO₂
Si	ⓘ Albite	Na(AlSi₃O₈)
Si	ⓘ Quartz var. Amethyst	SiO₂
Si	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
Si	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Si	ⓘ Quartz var. Chalcedony	SiO₂
Si	ⓘ Haüyne	Na₃Ca(Si₃Al₃)O₁₂(SO₄)
Si	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
Si	ⓘ Kaolinite	Al₂(Si₂O₅)(OH)₄
Si	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
Si	ⓘ Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O
Si	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
Si	ⓘ Pumpellyite Subgroup	Ca₂XAl₂[Si₂O₆(OH)][SiO₄](OH)₂A
Si	ⓘ Quartz	SiO₂
Si	ⓘ Stilbite Subgroup	M_6-7[Al_8-9Si_27-28O₇₂] · nH₂O
Si	ⓘ Wairakite	Ca(Al₂Si₄O₁₂) · 2H₂O
Si	ⓘ Quartz var. Fortification Agate	SiO₂
Si	ⓘ Fayalite-Forsterite Series
Si	ⓘ Hornblende Root Name Group	◻Ca₂(C₄²⁺C³⁺)(AlSi₇O₂₂)W₂
Si	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	ⓘ Allanite Group	(A1²⁺REE³⁺)(M1³⁺M2³⁺M3²⁺)O[Si₂O₇][SiO₄](OH)
S	Sulfur
S	ⓘ Alunite	KAl₃(SO₄)₂(OH)₆
S	ⓘ Arsenopyrite	FeAsS
S	ⓘ Baryte	BaSO₄
S	ⓘ Chalcopyrite	CuFeS₂
S	ⓘ Galena	PbS
S	ⓘ Haüyne	Na₃Ca(Si₃Al₃)O₁₂(SO₄)
S	ⓘ Marcasite	FeS₂
S	ⓘ Sphalerite	ZnS
S	ⓘ Tetrahedrite Subgroup	Cu₆(Cu₄C₂²⁺)Sb₄S₁₂S
K	Potassium
K	ⓘ Alunite	KAl₃(SO₄)₂(OH)₆
K	ⓘ Carnotite	K₂(UO₂)₂(VO₄)₂ · 3H₂O
K	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
K	ⓘ Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O
Ca	Calcium
Ca	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Euxenite-(Y)	(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆
Ca	ⓘ Haüyne	Na₃Ca(Si₃Al₃)O₁₂(SO₄)
Ca	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
Ca	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
Ca	ⓘ Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O
Ca	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
Ca	ⓘ Pumpellyite Subgroup	Ca₂XAl₂[Si₂O₆(OH)][SiO₄](OH)₂A
Ca	ⓘ Tyuyamunite	Ca(UO₂)₂(VO₄)₂ · 5-8H₂O
Ca	ⓘ Wairakite	Ca(Al₂Si₄O₁₂) · 2H₂O
Ca	ⓘ Hornblende Root Name Group	◻Ca₂(C₄²⁺C³⁺)(AlSi₇O₂₂)W₂
Ca	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Ti	Titanium
Ti	ⓘ Euxenite-(Y)	(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆
V	Vanadium
V	ⓘ Carnotite	K₂(UO₂)₂(VO₄)₂ · 3H₂O
V	ⓘ Tyuyamunite	Ca(UO₂)₂(VO₄)₂ · 5-8H₂O
V	ⓘ Vésigniéite	BaCu₃(VO₄)₂(OH)₂
Fe	Iron
Fe	ⓘ Arsenopyrite	FeAsS
Fe	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Fe	ⓘ Chalcopyrite	CuFeS₂
Fe	ⓘ Marcasite	FeS₂
Fe	ⓘ Siderite	FeCO₃
Fe	ⓘ Fayalite-Forsterite Series
Cu	Copper
Cu	ⓘ Chalcopyrite	CuFeS₂
Cu	ⓘ Tetrahedrite Subgroup	Cu₆(Cu₄C₂²⁺)Sb₄S₁₂S
Cu	ⓘ Vésigniéite	BaCu₃(VO₄)₂(OH)₂
Zn	Zinc
Zn	ⓘ Sphalerite	ZnS
As	Arsenic
As	ⓘ Arsenopyrite	FeAsS
Y	Yttrium
Y	ⓘ Euxenite-(Y)	(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆
Nb	Niobium
Nb	ⓘ Euxenite-(Y)	(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆
Sb	Antimony
Sb	ⓘ Tetrahedrite Subgroup	Cu₆(Cu₄C₂²⁺)Sb₄S₁₂S
Ba	Barium
Ba	ⓘ Baryte	BaSO₄
Ba	ⓘ Vésigniéite	BaCu₃(VO₄)₂(OH)₂
Ce	Cerium
Ce	ⓘ Euxenite-(Y)	(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆
Ta	Tantalum
Ta	ⓘ Euxenite-(Y)	(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆
Au	Gold
Au	ⓘ Native Gold	Au
Pb	Lead
Pb	ⓘ Galena	PbS
Th	Thorium
Th	ⓘ Euxenite-(Y)	(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆
U	Uranium
U	ⓘ Carnotite	K₂(UO₂)₂(VO₄)₂ · 3H₂O
U	ⓘ Euxenite-(Y)	(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆
U	ⓘ Tyuyamunite	Ca(UO₂)₂(VO₄)₂ · 5-8H₂O

Fossils

There are 161 fossil localities from the PaleoBioDB database within this region.

These data are provided on an experimental basis and are taken from external databases. Mindat.org has no control currently over the accuracy of these data.

Occurrences

161

Youngest Fossil Listed

0.01 Ma (Pleistocene)

Oldest Fossil Listed

201 Ma (Early Jurassic)

Stratigraphic Units

Click here to view 10 stratigraphic units.

Fossils from Region

Click here to show the list.

Accepted Name	Hierarchy	Age
Gastropoda class	Animalia : Mollusca : Gastropoda	157.3 - 145 Ma Jurassic
Pseudocalycoceras genus	Animalia : Mollusca : Cephalopoda : Ammonoidea : Acanthoceratidae : *Pseudocalycoceras*	99.6 - 93.5 Ma Late/Upper Cretaceous
Ostracoda class	Animalia : Arthropoda : Ostracoda	157.3 - 145 Ma Jurassic
Aves class	Animalia : Chordata : Aves	72.1 - 66 Ma Late/Upper Cretaceous
Goniopholis genus	Animalia : Chordata : Reptilia : Crocodylia : Goniopholididae : *Goniopholis*	157.3 - 145 Ma Jurassic
Theropoda unranked clade	Animalia : Chordata : Saurischia : Theropoda	157.3 - 145 Ma Jurassic
Allosaurus genus	Animalia : Chordata : Reptilia : Dinosauria : Allosauridae : *Allosaurus*	157.3 - 145 Ma Jurassic
Sauropoda unranked clade	Animalia : Chordata : Saurischia : Sauropoda	157.3 - 145 Ma Jurassic
Camarasaurus genus	Animalia : Chordata : Reptilia : Dinosauria : Camarasauridae : *Camarasaurus*	157.3 - 145 Ma Jurassic
Hadrosauridae family	Animalia : Chordata : Reptilia : Dinosauria : Hadrosauridae	72.1 - 66 Ma Late/Upper Cretaceous
Ceratopsidae family	Animalia : Chordata : Reptilia : Dinosauria : Ceratopsidae	72.1 - 66 Ma Late/Upper Cretaceous
Spermophilus genus	Animalia : Chordata : Mammalia : Rodentia : Sciuridae : *Spermophilus*	4.9 - 1.8 Ma Cenozoic
Geomys genus	Animalia : Chordata : Mammalia : Rodentia : Geomyidae : *Geomys*	4.9 - 1.8 Ma Cenozoic
Platygonus genus	Animalia : Chordata : Mammalia : Artiodactyla : Tayassuidae : *Platygonus*	4.9 - 1.8 Ma Cenozoic
Gigantocamelus genus	Animalia : Chordata : Mammalia : Artiodactyla : Camelidae : *Gigantocamelus*	4.9 - 1.8 Ma Cenozoic
Bison genus	Animalia : Chordata : Mammalia : Artiodactyla : Bovidae : *Bison*	0.126 - 0.0117 Ma Pleistocene
Gomphotheriidae family	Animalia : Chordata : Mammalia : Proboscidea : Gomphotheriidae	4.9 - 1.8 Ma Cenozoic
Paramylodon genus	Animalia : Chordata : Mammalia : Pilosa : Mylodontidae : *Paramylodon*	4.9 - 1.8 Ma Cenozoic
Camelops hesternus species	Animalia : Chordata : Mammalia : Artiodactyla : Camelidae : Camelops : *Camelops hesternus*	0.126 - 0.0117 Ma Pleistocene
Canis latrans species	Animalia : Chordata : Mammalia : Carnivora : Canidae : Canis : *Canis latrans*	0.126 - 0.0117 Ma Pleistocene
Cynomys niobrarius species	Animalia : Chordata : Mammalia : Rodentia : Sciuridae : Cynomys : *Cynomys niobrarius*	0.126 - 0.0117 Ma Pleistocene
Cynomys spenceri species	Animalia : Chordata : Mammalia : Rodentia : Sciuridae : Cynomys : *Cynomys spenceri*	0.126 - 0.0117 Ma Pleistocene
Mammuthus columbi species	Animalia : Chordata : Mammalia : Proboscidea : Elephantidae : Mammuthus : *Mammuthus columbi*	0.126 - 0.0117 Ma Pleistocene
Equus conversidens species	Animalia : Chordata : Mammalia : Perissodactyla : Equidae : Equus : *Equus conversidens*	0.126 - 0.0117 Ma Pleistocene
Equus (Dolichohippus) simplicidens species	Animalia : Chordata : Mammalia : Perissodactyla : Equidae : Equus : *Equus (Dolichohippus) simplicidens*	4.9 - 1.8 Ma Cenozoic
Hemiauchenia macrocephala species	Animalia : Chordata : Mammalia : Artiodactyla : Camelidae : Hemiauchenia : *Hemiauchenia macrocephala*	4.9 - 1.8 Ma Cenozoic
Microtus ochrogaster species	Animalia : Chordata : Mammalia : Rodentia : Cricetidae : Microtus : *Microtus ochrogaster*	0.126 - 0.0117 Ma Pleistocene
Prodipodomys centralis species	Animalia : Chordata : Mammalia : Rodentia : Heteromyidae : Prodipodomys : *Prodipodomys centralis*	4.9 - 1.8 Ma Cenozoic
Geomys bursarius species	Animalia : Chordata : Mammalia : Rodentia : Geomyidae : Geomys : *Geomys bursarius*	0.126 - 0.0117 Ma Pleistocene
Chaetodipus hispidus species	Animalia : Chordata : Mammalia : Rodentia : Heteromyidae : Chaetodipus : *Chaetodipus hispidus*	0.126 - 0.0117 Ma Pleistocene
Peromyscus cragini species	Animalia : Chordata : Mammalia : Rodentia : Cricetidae : Peromyscus : *Peromyscus cragini*	0.126 - 0.0117 Ma Pleistocene
Peromyscus progressus species	Animalia : Chordata : Mammalia : Rodentia : Cricetidae : Peromyscus : *Peromyscus progressus*	0.126 - 0.0117 Ma Pleistocene
Spermophilus tridecemlineatus species	Animalia : Chordata : Mammalia : Rodentia : Sciuridae : Spermophilus : *Spermophilus tridecemlineatus*	0.126 - 0.0117 Ma Pleistocene
Sigmodon curtisi species	Animalia : Chordata : Mammalia : Rodentia : Cricetidae : Sigmodon : *Sigmodon curtisi*	4.9 - 1.8 Ma Cenozoic
Sigmodon minor species	Animalia : Chordata : Mammalia : Rodentia : Cricetidae : Sigmodon : *Sigmodon minor*	4.9 - 1.8 Ma Cenozoic
Tapirus (Helicotapirus) haysii species	Animalia : Chordata : Mammalia : Perissodactyla : Tapiridae : Tapirus : *Tapirus (Helicotapirus) haysii*	4.9 - 1.8 Ma Cenozoic
Dinosauria order	Animalia : Chordata : Reptilia : Dinosauria	201.3 - 145 Ma Jurassic
Tetrapoda unranked clade	Animalia : Chordata : Osteichthyes : Tetrapoda	72.1 - 66 Ma Late/Upper Cretaceous
Platanus raynoldsi species	Plantae : Spermatophyta : Magnoliopsida : Proteales : Platanaceae : Platanus : *Platanus raynoldsi*	66 - 56 Ma Paleocene
Ficus genus	Plantae : Tracheophyta : Magnoliopsida : Rosales : Moraceae : *Ficus*	66 - 56 Ma Paleocene
Camptosauridae family	Animalia : Chordata : Reptilia : Dinosauria : Camptosauridae	157.3 - 145 Ma Jurassic
Artocarpus lessigiana species	Plantae : Tracheophyta : Magnoliopsida : Rosales : Moraceae : Artocarpus : *Artocarpus lessigiana*	66 - 56 Ma Paleocene
Cercidiphyllum genus	Plantae : Tracheophyta : Magnoliopsida : Saxifragales : Cercidiphyllaceae : *Cercidiphyllum*	66 - 56 Ma Paleocene
Magnolia genus	Plantae : Tracheophyta : Magnoliopsida : Magnoliales : Magnoliaceae : *Magnolia*	66 - 56 Ma Paleocene
Acer genus	Plantae : Tracheophyta : Magnoliopsida : Sapindales : Sapindaceae : *Acer*	66 - 56 Ma Paleocene
Cissus genus	Plantae : Tracheophyta : Magnoliopsida : Vitales : Vitaceae : *Cissus*	66 - 56 Ma Paleocene
Nyssa genus	Plantae : Tracheophyta : Magnoliopsida : Cornales : Nyssaceae : *Nyssa*	66 - 56 Ma Paleocene
Phyllites genus	Plantae : Tracheophyta : Magnoliopsida : *Phyllites*	66 - 56 Ma Paleocene
Equisetum genus	Plantae : Tracheophyta : Polypodiopsida : Equisetales : Equisetaceae : *Equisetum*	157.3 - 145 Ma Jurassic
Carya antiquorum species	Plantae : Tracheophyta : Magnoliopsida : Fagales : Juglandaceae : Carya : *Carya antiquorum*	66 - 56 Ma Paleocene
Anemia genus	Plantae : Tracheophyta : Polypodiopsida : Schizaeales : Anemiaceae : *Anemia*	66 - 56 Ma Paleocene
Dryopteris genus	Plantae : Tracheophyta : Polypodiopsida : Polypodiales : Dryopteridaceae : *Dryopteris*	66 - 56 Ma Paleocene
Juglans genus	Plantae : Tracheophyta : Magnoliopsida : Fagales : Juglandaceae : *Juglans*	66 - 56 Ma Paleocene
Unionidae family	Animalia : Mollusca : Bivalvia : Unionida : Unionidae	157.3 - 145 Ma Jurassic
Holostei infraclass	Animalia : Chordata : Actinopteri : Holostei	157.3 - 145 Ma Jurassic
Magnoavipes genus	Animalia : Chordata : Saurischia : Avetheropoda : Ornithomimipodidae : *Magnoavipes*	113 - 100.5 Ma Early/Lower Cretaceous
Tylosaurus proriger species	Animalia : Chordata : Reptilia : Squamata : Mosasauridae : Tylosaurus : *Tylosaurus proriger*	83.6 - 72.1 Ma Late/Upper Cretaceous
Hadrosauropodus leonardii species	Animalia : Chordata : Ornithischia : Iguanodontipodidae : Hadrosauropodus : *Hadrosauropodus leonardii*	113 - 100.5 Ma Early/Lower Cretaceous
Chara genus	Plantae : Charophyta : Charophyceae : Charales : Characeae : *Chara*	157.3 - 145 Ma Jurassic
Parabrontopodus mcintoshi species	Animalia : Chordata : Saurischia : Parabrontopodus : *Parabrontopodus mcintoshi*	157.3 - 145 Ma Jurassic
Ficus (Ficus) subgenus	Animalia : Mollusca : Gastropoda : Ficidae : Ficus : *Ficus (Ficus)*	66 - 56 Ma Paleocene
Calycoceras (Calycoceras) naviculare species	Animalia : Mollusca : Cephalopoda : Ammonitida : Acanthoceratidae : Calycoceras : *Calycoceras (Calycoceras) naviculare*	99.6 - 93.5 Ma Late/Upper Cretaceous
Eucalycoceras pentagonum species	Animalia : Mollusca : Cephalopoda : Ammonitida : Acanthoceratidae : Eucalycoceras : *Eucalycoceras pentagonum*	99.6 - 93.5 Ma Late/Upper Cretaceous
Anisoceras plicatilis species	Animalia : Mollusca : Cephalopoda : Ammonitida : Anisoceratidae : Anisoceras : *Anisoceras plicatilis*	99.6 - 93.5 Ma Late/Upper Cretaceous
Conchostraca unranked clade	Animalia : Arthropoda : Conchostraca	157.3 - 145 Ma Jurassic
Palmocarpon genus	Plantae : Angiospermae : Arecales : Palmae : *Palmocarpon*	66 - 56 Ma Paleocene
Euomphaloceras septemseriatum species	Animalia : Mollusca : Cephalopoda : Ammonitida : Acanthoceratidae : Euomphaloceras : *Euomphaloceras septemseriatum*	99.6 - 93.5 Ma Late/Upper Cretaceous
Moremanoceras scotti species	Animalia : Mollusca : Cephalopoda : Ammonitida : Desmoceratidae : Moremanoceras : *Moremanoceras scotti*	99.6 - 93.5 Ma Late/Upper Cretaceous
Metoicoceras geslinianum species	Animalia : Mollusca : Cephalopoda : Ammonitida : Acanthoceratidae : Metoicoceras : *Metoicoceras geslinianum*	99.6 - 93.5 Ma Late/Upper Cretaceous
Vitis genus	Plantae : Tracheophyta : Magnoliopsida : Vitales : Vitaceae : *Vitis*	66 - 56 Ma Paleocene
Inoceramus pictus species	Animalia : Mollusca : Bivalvia : Myalinida : Inoceramidae : Inoceramus : *Inoceramus pictus*	99.6 - 93.5 Ma Late/Upper Cretaceous
Zizyphus genus	Plantae : Tracheophyta : Magnoliopsida : Rosales : Rhamnaceae : *Zizyphus*	66 - 56 Ma Paleocene
Pseudocalycoceras angolaense species	Animalia : Mollusca : Cephalopoda : Ammonitida : Acanthoceratidae : Pseudocalycoceras : *Pseudocalycoceras angolaense*	99.6 - 93.5 Ma Late/Upper Cretaceous
Sciponoceras gracile species	Animalia : Mollusca : Cephalopoda : Ammonitida : Baculitidae : Sciponoceras : *Sciponoceras gracile*	99.6 - 93.5 Ma Late/Upper Cretaceous
Blechnum anceps species	Plantae : Tracheophyta : Polypodiopsida : Polypodiales : Blechnaceae : Blechnum : *Blechnum anceps*	66 - 56 Ma Paleocene
Lastrea goldiana species	Lastrea : *Lastrea goldiana*	66 - 56 Ma Paleocene
Sumitomoceras conlini species	Animalia : Mollusca : Cephalopoda : Ammonitida : Acanthoceratidae : Sumitomoceras : *Sumitomoceras conlini*	99.6 - 93.5 Ma Late/Upper Cretaceous
Sumitomoceras bentonianum species	Animalia : Mollusca : Cephalopoda : Ammonitida : Acanthoceratidae : Sumitomoceras : *Sumitomoceras bentonianum*	99.6 - 93.5 Ma Late/Upper Cretaceous
Laurophyllum caudatum species	Plantae : Tracheophyta : Magnoliopsida : Laurales : Lauraceae : Laurophyllum : *Laurophyllum caudatum*	66 - 56 Ma Paleocene
Laurus socialis species	Plantae : Tracheophyta : Magnoliopsida : Laurales : Lauraceae : Laurus : *Laurus socialis*	66 - 56 Ma Paleocene
Paloreodoxites plicatus species	Paloreodoxites : *Paloreodoxites plicatus*	66 - 56 Ma Paleocene
Sabal grayana species	Sabal : *Sabal grayana*	66 - 56 Ma Paleocene
Castanea intermedia species	Plantae : Tracheophyta : Magnoliopsida : Fagales : Fagaceae : Castanea : *Castanea intermedia*	66 - 56 Ma Paleocene
Prunus coloradensis species	Plantae : Tracheophyta : Magnoliopsida : Rosales : Rosaceae : Prunus : *Prunus coloradensis*	66 - 56 Ma Paleocene
Equus calobatus species	Animalia : Chordata : Mammalia : Perissodactyla : Equidae : Equus : *Equus calobatus*	4.9 - 1.8 Ma Cenozoic
Holaster feralis species	Animalia : Echinodermata : Echinoidea : Holasteroida : Holasteridae : Holaster : *Holaster feralis*	99.6 - 93.5 Ma Late/Upper Cretaceous

Fossil Localities

Click to show 32 fossil localities

Other Databases

Wikipedia:	https://en.wikipedia.org/wiki/Las_Animas_County,_Colorado
Wikidata ID:	Q128075
GeoNames ID:	5428059

Localities in this Region

USA

Colorado
- Las Animas County

USA

Colorado
- Las Animas County

Other Regions, Features and Areas that Intersect

North AmericaContinent

Rocky MountainsMountain Range

North America PlateTectonic Plate

Great Plains DomainDomain
Raton BasinBasin
Southern Rocky MountainsOrogenic Belt
Yavapai TerraneVolcanic Arc

USA

Central Colorado–Taos TroughBasin
Sangre de Christo Mountains

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

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Las Animas County, Colorado, USAiRegional Level TypesLas Animas CountyCounty ColoradoState USACountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }

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