Ontario Geological Survey
Permanent Link to this Record:
MDI31E06SW00019
| Record Name(s) | Robinson Quarry - 1989 |
|---|---|
| Related Record Type | Simple |
| Record Status | Occurrence |
| Date Created | 1991-Mar-18 |
| Date Last Modified | 2022-Jan-05 |
| Created By | Q Unknown |
| Revised By | A Wilson |
Primary Commodities: Gneiss
Township or Area: Chaffey
Latitude: 45° 20' 49.94" Longitude: -79° 16' 58.2"
UTM Zone: 17 Easting: 634519 Northing: 5022955.996 UTM Datum: NAD83
Resident Geologist District: Sudbury
NTS Grid: 31E06SW
Point Location Description: approximate
Location Method: Data Compilation
Access Description: Along the northwest side of Skyhills road, 2.5 km. west from Muskoka road #2. Forms the eastward-looking face of a steep hill, some 70 metres high.
1950's: stone taken from fallen blocks
Province: Grenville
Subprovince: Central Gneiss Belt
Geological Age: Mesoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Gneiss-Unsubdivided | 1 | Andesine Monzogranite | Host |
|---|---|---|---|---|
| Amphibolite | 2 | Adjacent |
Apr 14, 2011 (A Wilson) - Grey, gneissic andesine monzogranite with a metamorphic fabric, highly stretched pink alkali feldspar phenocrysts and prominent garnet porphyroblasts. Attractive, massive and competent interlayered grey (60%) and pink (40%) gneiss. There are also soft biotitic bands, l to 5 cm thick, which weather recessively. The layers of grey and pink gneiss range from a few centimeters to two metres in thickness. Locally, the gneiss contains pink, orange and white layers and they are interpreted to be cataclastic pegmatites. Garnet is fairly abundant throughout. This is a "straight gneiss", occurring at the contact of the Huntsville and Novar subdomains. The hill is capped by a coronitic metagabbro.
Apr 14, 2011 (A Wilson) - Natural partings parallel to foliation, and the moderate density of vertical joints, suggest that large slabs of 10 cm (4") or more in thickness can be readily obtained, suitable for use as veneer, steps and sills. The size and flatness may also make them suitable for guillotining. Many of the fallen blocks, and loose blocks on the cliff face are in the order of nine metric tonnes (ten tons) or more. Some of these may be suitable for architectural stone, and amenable to sawing. The steepness of the cliff and its proximity to the Skyhills road may hamper development.
| Rank | Classification |
|---|---|
| 1 | Dimension Stone |
Mono - Gneisses of the Parry Sound-Muskoka area: flagstone resources
Publication Number: OFR5725 Scale: Date: 1989
Author: Fouts C.R., Marmont C.
Publisher Name: Ontario Geological Survey
Mono - Building stone, feldspar and limestone resources in central Ontario
Publication Number: OFR5760 Scale: Date: 1991
Author: Marmont C.
Publisher Name: Ontario Geological Survey
Map - Haliburton area, Province of Ontario
Publication Number: ARM52A Scale: 1:126,720 Date: 1998
Author: Satterly J.
Publisher Name: Ontario Dept. of Mines
Map - Parry Sound-Huntsville area, Ontario
Publication Number: M2118 Scale: 1:126,720 Date: 1967
Author: Hewitt D.F.
Publisher Name: Ontario Dept. of Mines
Map - Precambrian Geology, Huntsville Area
Publication Number: P3413 Scale: 1:50,000 Date: 2000
Author: Lumbers S.B., Vertolli V.M.
Publisher Name: Ontario Geological Survey
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