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