Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 83 STATION 5080
EASTING 572563 NORTHING 6039704 ZONE 14 DATUM NAD83
Date of mapping 06/27/1983

STRUCTURAL DATA

Layering:
Layering type | Strike | Dip | top Direction
igneous cumulous layering | 317 | 39 | NE

Layering measurement cumulous layering in gabbro.

PETROLOGIC DATA

Rock Number: 1

Rock Type: gabbro
Descriptors:
anorthositic
layered
Field Description:

-Excellant exposure of cumulous layered anorthositic gabbro.
-Clinopyroxene/plagioclase layers indicate tops upright to west by cumulous grading.
-Shore since last station all gabbro with occasional roof pendant screens of tonalite gneiss and pegmatite.
-Photos of cumulate layering

PHOTOS

Beautiful outcrops of gabbro-norite with well developed orthocumulates of pyroxene - plagioclase defining igneous layer of 317/39, tops upright to the west.

Overview of the same location as previous photo.

Delicate orthocumulates showing cross bedding, slumps and drapes.

Orthocumulates in Molson gabbro - norite dike.

Manitoba Geological Survey, 2017