Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 84 STATION 5596
EASTING 580392 NORTHING 6062965 ZONE 14 DATUM NAD83
Date of mapping 07/15/1984

STRUCTURAL DATA

Layering:
Layering type | Strike | Dip | top Direction
bedding | 281 | 82 | N

-contact between silts and volcanics
-once again units interlayered at contact and extensive gossaning occurs
**volcanics (basalts) overlie felsic seds**

PETROLOGIC DATA

Rock Number: 1

Rock Type: basalt
Descriptors:
pillowed
massive
Field Description:

-extensive laminated mafic mudstone units
PHOTOS
1 -general view SLSN
2 -close-up of graded scour and rip up
3 -lithic arenite with felsic fragments

Minerals of Note
Mineral | Abundance (%)
garnet

Rock Number: 2

Rock Type: siltstone
Descriptors:
laminated
felsic
Field Description:

-just below contact is a coarser sand size unit with abundant blue black quartz eyes
-all siltstone checked for quartz eyes all day but they are to fine and sorted
-this is the first unit coarser enough to retain phenocryst fragments and it does!
-it is also visable a lithic arenite with the liths. of rhyolite composition
-fragments are up to 3 to 4 mm size (see photo 3)
SAMPLE
A -arenite with quartz eyes
B -gossan at contact

Manitoba Geological Survey, 2017