Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    86     STATION    6285
EASTING   569377     NORTHING   6047415     ZONE   14     DATUM   NAD83
Date of mapping    07/04/1986

STRUCTURAL DATA

Layering:
Layering type Strike Dip top Direction
bedding 291 69

Planar Structures:
Structure type Strike Dip Separation
cataclastic foliation 291 69

-appears to be parallel to shearing as there is resemblence continuity of layering across outcrop
-flattening extreme, tiny reef 5 m exposed 30 m under water

PETROLOGIC DATA

Rock Number: 1

Rock Type: conglomerate
Descriptors:
pebbly
mafic

Field Description:

-section of mafic BO+/-HB matrix pebble conglomerate and budded mafic to leucocratic BO wackes
-pebbles include granitic, quartz and highly flattened mafic (probably volcanic)
-minor interbedds of calcsilicate bearing sands--10 to 25 cm thick
-foliation invaded by pink and white mottled pegs that are sheared to near mylonite texture
-there are thin amphibolitic horizons (SAMPLE B) that average 15 cm and are continuous across outcrop
-conglomerate matrix appears to be a dirty feldspathic sand-deformation too high to recognize lithic fragments

Minerals of Note
Mineral Abundance (%)
hornblende


Manitoba Geological Survey, 2017