The Kap Stewart Group is a geological group in eastern Greenland of Late Triassic (Rhaetian) to Early Jurassic (Sinemurian) age. It consists of a 155-600 m thick sequence of interbedded mudstones and fluvio-deltiac sandstones deposited in a "large wave and storm-dominated lake".[2][3]
| Kap Stewart Group | |
|---|---|
| Stratigraphic range: Rhaetian-Sinemurian | |
| Type | Group |
| Sub-units | Innakajik, Primulaelv & Rhætelv Formations |
| Underlies | Neill Klinter Group |
| Overlies | Scoresby Land Group[1] |
| Area | >12,000 km2 (4,600 sq mi) |
| Thickness | 155–600 m (509–1,969 ft) |
| Location | |
| Region |  Greenland |
| Type section | |
| Named for | Kap Stewart |
Description
editOriginally known as the Kap Stewart Formation, it was later raised to Group status.[3] It comprises three formations, the organic-rich lacustrine mudstones with interbedded sheet sandstones of the Rhætelv Formation (developed in the basin centre) the alluvial plain sandstone and conglomerate of the Innakajik Formation overlain by delta plain sandstones to mudstones of the Primulaelv Formation (both restricted to the basin margin).[3]
References
edit- ^ Kent, D.V.; Clemmensen L.B. (1996). "Paleomagnetism and cycle stratigraphy of the Triassic Fleming Fjord and Gipsdalen Formations of East Greenland" (PDF). Bulletin of the Geological Society of Denmark. 42: 121–136. Retrieved 6 December 2012.
- ^ Surlyk, F.; Noe-Nygaard N.; Dam G. (1993). "High and low resolution sequence stratigraphy in lithological prediction–examples from the Mesozoic around the northern North Atlantic". In Parker J.R. & Bartholomew I.D. (ed.). Petroleum geology of Northwest Europe: proceedings of the 4th conference. London: Geological Society. pp. 199–214. ISBN 9780903317856. Retrieved 1 December 2012.
- ^ a b c Surlyk, F. (2003). "The Jurassic of East Greenland: a sedimentary record of thermal subsidence, onset and culmination of rifting" (PDF). Geological Survey of Denmark and Greenland Bulletin. 1. GEUS: 659–722. Retrieved 6 December 2012.