Lona Bay sequence

Unit Name: Lona Bay sequence
Unit Type: Lithostratigraphic
Rank: Undefined
Status: Informal
Usage: Currently in use
Age Interval: Middle Paleoproterozoic (2100 - 1800 ma)
Province/Territory: Nunavut

Originator: St-Onge et al., 2007

Type Locality:

Foxe Peninsula, Baffin Island, Nunavut.

Distribution:

Distribution of Schooner Harbour sequence documented in: St-Onge et al., 2007.

Lithology:

The Lona Bay sequence is composed of homogeneous arenaceous rocks. The sequence contains cream- to buff weathering quartzose rocks. The rocks are often well bedded, and can be distinguished based on variations in grain size, cross-stratification and distribution of porphyroblasts. Quartzite; Kfeldspar + sillimanite ± muscovite (faserkiesel) bearing; feldspathic arenite, conglomerate (St-Onge et al. 2007)

Relationship:

The Lona Bay sequence is structurally and stratigraphically overlain by the Schooner Harbour sequence. Correlations based on composition, texture and weathering of the rocks on the Foxe Peninsula provide evidence that the Lona Bay sequence may disconformably overlie the Lake Harbour Group (Sanbor-Barrie et al., 2008).

References:

Sanborn-Barrie, M., St-Onge, M.R., Young M.D., and James D.T., 2008. Bedrock Geology of Southwestern Baffin Island, Nunavut: Expanding the Tectonostratigraphic Framework with Relevance to mineral resources; Geological Survey of Canada, Current Research 2008-6, 16 p.

St-Onge, M.R., Sanborn-Barrie, M., and Young, M., 2007. Geology, Foxe Peninsula, Baffin Island, Nunavut. Geological Survey of Canada Open File Map 5434, 1:250 000 scale.

Source: GEOLOGICAL SURVEY OF CANADA
Contributor: P.H. Davenport; Holly Girling
Entry Reviewed: No
Name Set: Lithostratigraphic Lexicon
LastChange: 25 Mar 2009