I was teaching rocks and minerals (Grade 4). I wish I had time then to research it. I was given an assignment of a gr. 4/5 split class.
From THE ONTARIO CURRICULUM:
Grade 4 students review learning about soil, and construct new learning on rocks, the characteristics and causes of erosion, and how to protect against soil erosion. Grade 5 students review learning about the characteristics and causes of erosion, and construct new learning about weather, including how to measure it, predict it, and adapt to it.
Sand deposits dot Lanark County, with quarries being a common sight. Sandstone, dolomite and fossiliferous limestone are present, as well. Corals, bivalve brachiopods lived once on this sea floor, giant squid-like cephalopods with conical shells. They all lie silently, waiting to tell their story.
This short history was inspired by the field trip on October 28, 2007, when members of ...geology of Lanark County with Professors Allan Donaldson.
The last ice sheet to cover Canada reached its maximum thickness and size about 20 000 years ago. Southern Ontario was buried by ice about 1 kilometre thick, that originated in Quebec and Labrador, until about 12 000 years ago. The tremendous weight of the ice pushed the Earth’s crust down some 400 metres.
|marsh on our back 40|
|Spring in our old swamp|
Flora and Fauna
The flora and fauna interests me, heavily influenced, of course by the bedrock. We know so much more now about ecosystems. The Canadian Shield is acidic. However, the glacier deposited acidic glacial till onto the more neutral limestone and sandstones. You can see in the valleys and crevasses boggy wetlands where the bulrushes grow and silt and clay has washed off of the limestone rock up above. Our deer constantly walk through this bog leaving a bit of a trail. The deer quite like our grassy meadow down in the valley, but their feeding trough lulls them in.
Having just moved here in mid-September, I shall look forward to exploring more of the natural flora next spring. The 2006 version a list of a full list was made available on the www.lanarkflora.com web site.
by DJ White - 2010
The geology of Lanark County is quite complex due to the presence of younger limestones and sandstones in the eastern part of the county, and much older granites, gneisses, and marbles of the Canadian Shield in the western part of the county (Douglas, 1978; Freeman, 1979).
Some of the Lanark County specimens ... are of interest from a historical point of view. The first known collections (1861-1867) were made by John Kerr McMorine—a clergyman and amateur botanist who lived and collected in Ramsay, west of Almonte (see Ross, 1984). --in White, 2010
Mineral and Aggregate Resources