none 10.1144/gsjgs.136.6.0755 Geological Society of London Geological Society of London 1881 30748090 44798 2024111903225900259 10.1144 2024-11-19T07:37:15Z 2007-12-20T17:39:02Z 257 Journal of the Geological Society JGS 0016-7649 2041-479X 05 16 2007 11 1979 136 6 J. K. Leggett W. S. McKerrow M. H. Eales The Southern Uplands contain 10 or more distinct deep-water stratigraphic sequences consisting of basalt and chert and/or graptolitic shale, below thick greywackes. These sequences are separated by major reverse strike faults. Adjacent sequences differ in sedimentary characteristics and age, indicating that they were originally deposited far apart. Within each fault-bounded tract the individual sequences are disrupted and repeated by further, less important, strike faults and by folding. In the N (away from the site of the Iapetus Ocean) the sequences are older than in the S, but the majority of the beds within each sequence young to the N. This structure is compared with modern accretionary prisms, which develop on active continental margins where the oceanic plate has a thick sedimentary cover. 06 06 2022 11 1979 755 770 10.1144/gsjgs.136.6.0755 1 10.1144/crossmark-policy www.lyellcollection.org true 1979-04-09 1979-06-29 2022-06-06 https://doi.org/10.15223/policy-002 10.1144/gsjgs.136.6.0755 https://www.lyellcollection.org/doi/10.1144/gsjgs.136.6.0755 https://www.lyellcollection.org/doi/pdf/10.1144/gsjgs.136.6.0755 https://geoscienceworld.org/jgs/article-lookup?doi=10.1144/gsjgs.136.6.0755 10.1144/gsjgs.133.5.0481 10.1111/j.1365-246X.1978.tb06755.x 10.1130/MEM127-p83 Spec. Pub. Soc. econ. Paleontol. Mineral Blake M. C. 345 19 1974 Origin of Franciscan melanges in Northern California Blake M. C., Jones D. L.Origin of Franciscan melanges in Northern CaliforniaSpec. Pub. Soc. econ. Paleontol. 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