Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    86     STATION    6519
EASTING   582672     NORTHING   6064767     ZONE   14     DATUM   NAD83
Date of mapping    08/02/1986

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
cataclastic foliation 61 83

-note this outcrop is highly sheared so I have no idea how much bed thickness attenuation has happened to bed thickness, it is relative for comparison only

PETROLOGIC DATA

Rock Number: 1

Rock Type: siltstone
Descriptors:
laminated
quartz-muscovite

Field Description:

-grey quartz rich phyllitic schist - probably a siltstone
-occurs as beds up to 1 m thick
-Dense layers of knotted MB - may have had aluminosilicate

Rock Number: 2

Rock Type: conglomerate
Descriptors:
cataclastic
polymictic

Field Description:

-sheared C.L.G. poly conglomerate in 1 to 3 m beds
-rusty grey weathering
-identifiable clasts: quartz pebbles, white tonalite, felsic volcanic, ampb (2mm x 20 cm) and pick clasts (dominant type?)
-largest clasts are grey to white TNLT
-some clasts may have been high level feld. porphyry

Minerals of Note
Mineral Abundance (%)
garnet

Rock Number: 3

Rock Type: sandstone
Descriptors:
crossbedded
feldspathic

Field Description:

-light grey sandstone - massive beds 2 to 4 m thick
-traces of highly flattened cross beds.


Manitoba Geological Survey, 2017