Ottawa General Hospital Landscaping occurrence, Gloucester Township, Carleton Co., Ontario, Canada
|Latitude & Longitude (WGS84):||45° 24' 6'' North , 75° 38' 52'' West|
|Latitude & Longitude (decimal):||45.40167,-75.64778|
|Köppen climate type:||Dfb : Warm-summer humid continental climate|
This is the very literally descriptive name given by the Canadian Museum of Nature to the site where a ~8cm glacial boulder of lapis lazuli was found by Judith Bainbridge in 1992. It's a small patch of landscaping stone outside one of the entrances to the hospital.
Other areas of the hospital were searched, and attempts were made to find the source, but neither the gravel pit where the boulder was 'mined', nor the in-situ occurrence for the lazurite was ever located, and this remains the only piece known to have been found. It was, however, determined that the yard which supplied the stone had only received shipments from Ottawa area (Ontario) pits. It is therefore rightly catalogued as an Ontario location, but the in-situ occurrence may very well be in Quebec. No comparable material is known from any Canadian location.
According to George Robinson (then curator at the National), it was the only piece of Ontario lapis known, and the single best Canadian example. A large piece (about 1/4 of the ~8cm boulder) is on display in Ottawa, and with the exception of a couple of small chips, the rest remains within the Bainbridge family.
2 valid minerals.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
443.8 - 458.4 Ma
|Georgian Bay Formation; Blue Mountain Formation; Billings Formation; Collingwood Member; Eastview Member|
Age: Late Ordovician (443.8 - 458.4 Ma)
Stratigraphic Name: Georgian Bay Formation; Blue Mountain Formation; Billings Formation; Collingwood Member; Eastview Member
Reference: Ontario Geological Survey. 1:250 000 scale bedrock geology of Ontario. ISBN 978-1-4435-5705-4. Miscellaneous Release–Data 126 - Revision 1.