Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 84 STATION 5597
EASTING 580511 NORTHING 6062880 ZONE 14 DATUM NAD83
Date of mapping 07/15/1984

STRUCTURAL DATA

Layering:
Layering type | Strike | Dip | top Direction
bedding | 271 | 78 | N

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 271 | 78 |

-contact with gossan-volcanic to north, seds to south--volcanic overlies seds (tops unquestionable within 5 m of contact)

PETROLOGIC DATA

Rock Number: 1

Rock Type: sandstone
Descriptors:
bedded
lithic
Field Description:

-medium grained grey to brown weathering sandstone with light colour felsic fragments and quartz eyes
-forms beds upto 1 m thick and numerous graded trough deposits in siltstone
-most abundant at top near contact and disappears within 40 m down section into SLSN
-sample has siltstone rep-up in it

Rock Number: 2

Rock Type: siltstone
Descriptors:
laminated
felsic
Field Description:

-as previous
-excellent preservation of sed. structure and soft sed. deformation

Rock Number: 3

Rock Type: sediments / sedimentary schist
Descriptors:
bedded
volcanic derived
Field Description:

-above contact at this locality is interbedded felsic and mafic siltstones, mafic mudstones and mafic volcanoclastics (?) with an upward increase in the number of flows
-the first appearance of mafic rock appears to be a flow at edge of most intense gossan
-it is a massive greenish black layer 2 m thick (sample B)

Rock Number: 4

Rock Type: diabase
Field Description:

-Molson 25 cm
- 057/81

Manitoba Geological Survey, 2017