Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 84 STATION 5588
EASTING 580005 NORTHING 6062534 ZONE 14 DATUM NAD83
Date of mapping 07/13/1984

STRUCTURAL DATA

-the whole outcrop is folded in a tight antiform with the axis trending approximately 050 degrees
-plunge near 80 degrees

PETROLOGIC DATA

Rock Number: 1

Rock Type: TUFF
Descriptors:
laminated
felsic
Field Description:

-finely laminated on mm scale rhyolite in composition
-local silification of the FLSC beds
-layers average 1 to 1.5 m and are interbedded with MAFC GRCK

Minerals of Note
Mineral | Abundance (%)
garnet

Rock Number: 2

Rock Type: greywacke
Descriptors:
laminated
mafic
Field Description:

-dark greenish black weathering CL rich LAMN silty GRCK

Minerals of Note
Mineral | Abundance (%)
garnet

Rock Number: 3

Rock Type: schist
Descriptors:
massive
calc-silicate mineral/concretion
Field Description:

-3 m exposed of rusty green heavily gossaned CL schist
-local silification
-alteration has obliterated all primary featrues but it is probable that it was derived from the tuffs and wackes

Manitoba Geological Survey, 2017