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Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canadai
Regional Level Types
Km 21 North on-rampRoad Cutting
Autoroute 5 roadcutsGroup of Road Cuttings
Autoroute 5 extensionRoad
Autoroute 5Road
ChelseaMunicipality
Les Collines-de-l'Outaouais RCMRegional County Municipality
OutaouaisAdministrative Region
QuébecProvince
CanadaCountry

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PhotosMapsSearch
03506910017365498345042.jpg
Limonite pockets

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
01102450017365499969074.jpg
Fluorite occurrence on Highway 5

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
04843800017365499966246.jpg
Fluorite occurrence - a closer view

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
02317630017365498281435.jpg
Limonite pockets

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
04417290017365499187491.jpg
Fluorite occurrence on Highway 5

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
04843800017365499966246.jpg
Fluorite occurrence - a closer view

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
03506910017365498345042.jpg
Limonite pockets

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
01102450017365499969074.jpg
Fluorite occurrence on Highway 5

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
Latitude & Longitude (WGS84):
45° 34' 24'' North , 75° 52' 26'' West
Latitude & Longitude (decimal):
45.57361,-75.87389
GRN:
N31W39
Type:
Road Cutting - last checked 2025
Köppen climate type:
Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Cantley10,412 (2018)7.1km
Wakefield2,000 (2016)10.8km
le Plateau15,000 (2015)17.0km
Gatineau242,124 (2016)17.2km
Val-des-Monts9,539 (2016)18.3km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Eastern Ontario Natural History Society (EONS) / Ottawa Paleontology ClubOttawa, Ontario22km
Ottawa Lapsmith and Mineral ClubOttawa, Ontario22km
Mindat Locality ID:
450458
Long-form identifier:
mindat:1:2:450458:3
GUID (UUID V4):
0


The km 21 on-ramp north is on the eastern side of the highway. It comes onto the highway at the 8+700 N mark (where the molybdenite occurrence is). It was the most prolific producer in terms of variety of species, and specimens were found along the entire length of the onramp. The exposed road cuts on either side had a varied geology. For example, the entrance area consists of aplite. Along the way there are various meta-igneous occurrences with crustal carbonatites filling fissures in the rock. One of these carbonatite dykes was cut by hydrothermal alterations leading to a wide variety of minerals. The area has been largely worked over.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


16 valid minerals.

Detailed Mineral List:

ⓘ Albite
Formula: Na(AlSi3O8)
References:
Jeffrey de Fourestier collectionIdentified by Jeffrey de Fourestier: Visual Identification
ⓘ 'Betafite Group'
Formula: A2(Ti,Nb)2O6Z
References:
Jeffrey de Fourestier collectionIdentified by Jeffrey de Fourestier: SEM-EDS
ⓘ Calcite
Formula: CaCO3
References:
Jeffrey de Fourestier collectionIdentified by Jeffrey de Fourestier: Visual Identification
ⓘ 'Chlorite Group'
References:
Jeffrey de Fourestier collectionIdentified by Jeffrey de Fourestier: Visual Identification
ⓘ Clinozoisite
Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
References:
Jeffrey de Fourestier collectionIdentified by Jeffrey de Fourestier: Visual Identification
ⓘ Corrensite
Formula: (Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2O
References:
Geological Survey of CanadaIdentification: XRD
ⓘ Fluorapatite
Formula: Ca5(PO4)3F
References:
Jeffrey de Fourestier collectionIdentification: SEM-EDS
ⓘ Fluorite
Formula: CaF2
References:
Jeffrey de Fourestier collectionIdentified by Jeffrey de Fourestier: Visual Identification
ⓘ Hematite
Formula: Fe2O3
References:
Jeffrey de Fourestier collectionIdentified by Jeffrey de Fourestier: Visual Identification
ⓘ Marcasite
Formula: FeS2
References:
Jeffrey de Fourestier collectionIdentified by Jeffrey de Fourestier: Visual Identification
ⓘ Microcline
Formula: K(AlSi3O8)
References:
Jeffrey de Fourestier collectionIdentified by Jeffrey de Fourestier: Visual Identification
ⓘ Pyrite
Formula: FeS2
References:
Jeffrey de Fourestier collectionIdentified by Jeffrey de Fourestier: Visual Identification
ⓘ 'Pyrochlore Group'
Formula: A2Nb2(O,OH)6Z
References:
Jeffrey de Fourestier collectionIdentified by Jeffrey de Fourestier: Visual Identification
ⓘ 'Pyrochlore Supergroup'
Formula: A2-mD2X6-wZ1-n
References:
Jeffrey de Fourestier collectionIdentification: SEM-EDS
ⓘ Pyrrhotite
Formula: Fe1-xS
References:
Jeffrey de Fourestier collectionIdentified by Jeffrey de Fourestier: Visual Identification, Inferred (explain how)
ⓘ Quartz
Formula: SiO2
References:
Jeffrey de Fourestier collectionIdentified by Jeffrey de Fourestier: Visual Identification
ⓘ Quartz var. Smoky Quartz
Formula: SiO2
References:
Jeffrey de Fourestier collectionIdentified by Jeffrey de Fourestier: Visual Identification
ⓘ Richterite
Formula: Na(NaCa)Mg5(Si8O22)(OH)2
References:
Jeffrey de Fourestier collectionIdentification: SEM-EDS
ⓘ 'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4
References:
Jeffrey de Fourestier collectionIdentified by Jeffrey de Fourestier: Visual Identification
ⓘ Sphalerite
Formula: ZnS
References:
Jeffrey de Fourestier collectionIdentified by Jeffrey de Fourestier: Visual Identification
ⓘ Titanite
Formula: CaTi(SiO4)O
References:
Jeffrey de Fourestier collectionIdentified by Jeffrey de Fourestier: Visual Identification
ⓘ Zircon
Formula: Zr(SiO4)
References:
Jeffrey de Fourestier collectionIdentified by Jeffrey de Fourestier: Visual Identification

Gallery:

CaCO3ⓘ Calcite
trans.png
Calcite, etc.

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
trans.png
Calcite, etc.

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
trans.png
Calcite, etc.

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
K(AlSi3O8)ⓘ Microcline
trans.png
Microcline

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
trans.png
Microcline

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
trans.png
Microcline

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
trans.png
Microcline

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
trans.png
Microcline

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
trans.png
Microcline

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
SiO2ⓘ Quartz
trans.png
Quartz, etc.

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
trans.png
Quartz, etc.

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
trans.png
Quartz, etc.

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
trans.png
Quartz, etc.

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
trans.png
Quartz, etc.

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
trans.png
Quartz, etc.

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
trans.png
Quartz, etc.

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
trans.png
Quartz, etc.

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
SiO2ⓘ Quartz var. Smoky Quartz
trans.png
Smoky Quartz

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
trans.png
Smoky Quartz

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
trans.png
Smoky Quartz

Km 21 North on-ramp, Autoroute 5 roadcuts, Autoroute 5 extension, Autoroute 5, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘSphalerite2.CB.05aZnS
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘPyrite2.EB.05aFeS2
ⓘMarcasite2.EB.10aFeS2
Group 3 - Halides
ⓘFluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
ⓘ'Pyrochlore Group'4.00.A2Nb2(O,OH)6Z
ⓘHematite4.CB.05Fe2O3
ⓘQuartz4.DA.05SiO2
ⓘvar. Smoky Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
Group 8 - Phosphates, Arsenates and Vanadates
ⓘFluorapatite8.BN.05Ca5(PO4)3F
Group 9 - Silicates
ⓘZircon9.AD.30Zr(SiO4)
ⓘTitanite9.AG.15CaTi(SiO4)O
ⓘClinozoisite9.BG.05a(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
ⓘRichterite9.DE.20Na(NaCa)Mg5(Si8O22)(OH)2
ⓘCorrensite9.EC.60(Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2O
ⓘMicrocline9.FA.30K(AlSi3O8)
ⓘAlbite9.FA.35Na(AlSi3O8)
Unclassified
ⓘ'Chlorite Group'-
ⓘ'Serpentine Subgroup'-D3[Si2O5](OH)4
ⓘ'Pyrochlore Supergroup'-A2-mD2X6-wZ1-n
ⓘ'Betafite Group'-A2(Ti,Nb)2O6Z

List of minerals for each chemical element

HHydrogen
Hⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Hⓘ Corrensite(Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2O
Hⓘ Pyrochlore GroupA2Nb2(O,OH)6Z
Hⓘ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Hⓘ Serpentine SubgroupD3[Si2O5](OH)4
CCarbon
Cⓘ CalciteCaCO3
OOxygen
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ CalciteCaCO3
Oⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Oⓘ Corrensite(Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2O
Oⓘ FluorapatiteCa5(PO4)3F
Oⓘ HematiteFe2O3
Oⓘ MicroclineK(AlSi3O8)
Oⓘ Pyrochlore GroupA2Nb2(O,OH)6Z
Oⓘ QuartzSiO2
Oⓘ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Oⓘ Quartz var. Smoky QuartzSiO2
Oⓘ TitaniteCaTi(SiO4)O
Oⓘ ZirconZr(SiO4)
Oⓘ Serpentine SubgroupD3[Si2O5](OH)4
Oⓘ Betafite GroupA2(Ti,Nb)2O6Z
FFluorine
Fⓘ FluorapatiteCa5(PO4)3F
Fⓘ FluoriteCaF2
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
Naⓘ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
MgMagnesium
Mgⓘ Corrensite(Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2O
Mgⓘ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Alⓘ Corrensite(Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2O
Alⓘ MicroclineK(AlSi3O8)
SiSilicon
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Siⓘ Corrensite(Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2O
Siⓘ MicroclineK(AlSi3O8)
Siⓘ QuartzSiO2
Siⓘ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Siⓘ Quartz var. Smoky QuartzSiO2
Siⓘ TitaniteCaTi(SiO4)O
Siⓘ ZirconZr(SiO4)
Siⓘ Serpentine SubgroupD3[Si2O5](OH)4
PPhosphorus
Pⓘ FluorapatiteCa5(PO4)3F
SSulfur
Sⓘ MarcasiteFeS2
Sⓘ PyriteFeS2
Sⓘ PyrrhotiteFe1-xS
Sⓘ SphaleriteZnS
KPotassium
Kⓘ MicroclineK(AlSi3O8)
CaCalcium
Caⓘ CalciteCaCO3
Caⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Caⓘ FluorapatiteCa5(PO4)3F
Caⓘ FluoriteCaF2
Caⓘ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Caⓘ TitaniteCaTi(SiO4)O
TiTitanium
Tiⓘ TitaniteCaTi(SiO4)O
Tiⓘ Betafite GroupA2(Ti,Nb)2O6Z
FeIron
Feⓘ Corrensite(Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2O
Feⓘ HematiteFe2O3
Feⓘ MarcasiteFeS2
Feⓘ PyriteFeS2
Feⓘ PyrrhotiteFe1-xS
ZnZinc
Znⓘ SphaleriteZnS
ZrZirconium
Zrⓘ ZirconZr(SiO4)
NbNiobium
Nbⓘ Pyrochlore GroupA2Nb2(O,OH)6Z
Nbⓘ Betafite GroupA2(Ti,Nb)2O6Z

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate

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