Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 84 STATION 5646
EASTING 569213 NORTHING 6048968 ZONE 14 DATUM NAD83
Date of mapping 07/23/1984

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 286 | 75 |

PETROLOGIC DATA

Rock Number: 1

Rock Type: greywacke
Descriptors:
lithic
mafic
Field Description:

-moving west along the shore from last station the CGLM gradually die out and the SNDS becomes parallel bedded contain internal cross bedding but much better sorting
-quartz content slowly rises until the rock is protoquartzite
-there are 8 m section missing between the quartzite and HB bearing greywacke
-I don't know if this is a conformable contact or fault related
-both GRCK adn SNDS CGLM have some faulting involved containing thin mylonite seams
-greywacke is massively bedded but contain very little comp. variation so that the weathering charact. of beds is the only way to differ. bedding
-as in the SNDS CGLM layering is tightly folded and highly flattened
-the N edge of the greywacke exposure has 60 cm discont. white quartzite layer, below this are several thin arkosic layers (see sample B, ALTERATION?)

Manitoba Geological Survey, 2017