Unit Name: Sinasiuvik Formation
Unit Type: Lithostratigraphic
Rank: Formation
Status: Formal
Usage: Currently in use
Age Interval: Ectasian - Stenian (1400 - 1000 ma)
Age Justification: Geochronology and paleomagnetic studies: between 1205 and 1190 ma (Knight and Jackson, 1994).
Province/Territory: Nunavut
Originator: Knight and Jackson, 1994.
Type Locality:
The Sinasiuvik Formation is named after Sinasiuvik Point located at the northeastern tip of Elwin Inlet at 73°29'37"N and 83°55'18"W on the northwest shore of Elwin Inlet (Knight and Jackson, 1994).
Locality Data:
Thickness(m): Minimum 370, Maximum 435.
Lithology:
The Sinasiuvik Formation consists predominantly of buff-brown quartz arenite, siltstone and blach shale, with lesser amounts of subarkose (Knight and Jackson, 1994).
Relationship:
The Sinasiuvik Formation, forms the upper part of the Elwin Subgroup (Nunasiaq Group, Bylot Supergroup), and overlies the Aqigilik Formation, and was divided into three informal members by Knight and Jackson (1994). It forms the yougest part of the Mesoproterozoic Bylot Supergroup.
History:
The formation was originally termed the upper member (EL1) of the Elwin Formation (Jackson and Iannelli, 1981).
References:
Jackson, G.D. and Iannelli, T.R., 1981. Rift-related cyclic sedimentation in the Neohelikian Borden Basin, northern Baffin Island. In Proterozoic Basins of Canada, Campbell, F.H.A. (editor), Geological Survey of Canada Paper 81-10, pages 269-302.
Knight, R D; Jackson, G D. 1994; Sedimentology and stratigraphy of the Mesoproterozoic Elwin Subgroup (Aqigilik and Sinasiuvik formations), uppermost Bylot Supergroup, Borden Rift basin, northern Baffin Island; Geological Survey of Canada, Bulletin 455, 48 pages
Contributor: P.H. Davenport
Entry Reviewed: No
Name Set: Lithostratigraphic Lexicon
LastChange: 24 Nov 2010