The voluminous litharenite unit (HSla of Barr et al.
These characteristics suggest derivation from the Mira terrane, especially the Fourchu Group, and to a lesser extent a litharenite in the Stirling Group, based on descriptions of those units in Barr et al.
The Sandy Lake Formation constitutes the upper part of the group and consists of pillow lavas with interbedded fine to coarse litharenite
of felsic volcanic derivation (locally termed 'arkose').
The latter has recently been identified as a fragment of Palaeozoic litharenite
, that is, a sandstone similar but not identical to the Altar Stone.
Prediction of engineering properties of selected litharenite
sandstone from its petrographic characteristics using correlation and multivariate statistical techniques.
0 (5 Y 5/2 to 7/2) micaceous calcite-cemented litharenite
, parallel-laminated, trough and tabular cross-bedded, with thick beds of pebble conglomerate composed of carbonate nodules, sedimentary rock fragments, and chert.
60 metres, was characterized by altered polylithic volcanic breccia and litharenite
locally hosting massive base metal clasts up to 4 centimetres in diameter containing chalcopyrite, sphalerite, and galena.
The Stirling Group consists dominantly of andesitic to basaltic lapilli turf, litharenite
, and siltstone, with subordinate basaltic flows and breccias, rhyolitic lapilli turf, and rhyolite porphyry (Macdonald and Barr 1993; Barr et al.
The upper part of the unit is dominated by sandstone with carbonaceous quartz-rich litharenite
and arkose inter- cross-stratified with subordinate grey siltstone and organic-rich shale.
In the easternmost McCoy Brook Formation basin, an irregular silicified body (5 m in length, 1 m thick) appears to have replaced permeable polymictic coarse litharenite