Cross Lake Project (1983-86)
Geologist P.G. Lenton
Year 83
STATION 5129
EASTING 575887
NORTHING 6041837
ZONE 14
DATUM NAD83
Date of mapping 07/10/1983
STRUCTURAL DATA
Rock Number | Type | Width (m) | Strike | Dip |
---|---|---|---|---|
1 | Molson dike | 0.00 | 236 | 77 |
PETROLOGIC DATA
Rock Number: 1
Footwall section
-1a lower chill
-1b 6.5 m above lower contact - 2 pyroxene gabbro
-1c coarse leucocratic gabbro with cumulate layering 14 m. above footwall
-excellent cumulate features including scours and cross bedding
PHOTO 1 - contact between cumulous and leucocratic gabbro layers
PHOTO 2 & 3 - truncation of layers in cross bedded sequence
PHOTO 4 - truncation of layering in scour
PHOTO 5 - high angle truncation of layering by leucocratic gabbro
PHOTO 6 - reprosentative photo of leucocratic gabbro
PHOTO 7 - cross bed truncation
PHOTO 8 - lamination in magma tube
PHOTO 9 & 10 - over view of outcrop showing magnitude of cross bedding
PHOTOS
Contact between orthocumulate layer and leuco-gabbro layer.
Layer truncation in crossbedded sequence.
Larger view of previos layer trauncation.
Truncation of layering in a scour. Note the autolith below the scale card.
High angle truncation of layering by leuco gabbro.
Representativee photo of the leuco gabbro (anorthositic gabbro).
Crossbed truncation.
Lamination in a magma tube piercing thick bedded orthocumulate.
Overview of outcrop showing the scale of the crossbedding.
Manitoba Geological Survey, 2017