An independent site about Canada as physical geography — the processes that made the ground
Autray
mrcautray.com
Five grounds · seventeen entries
Every entry is one place, located
Figures sourced or flagged
Complete roster

The register

Every entry on the site, in the order the sections run. Coordinates are given to the access point rather than the summit, the seam or the quarry face; where an entry is a process rather than a place, the ground it applies to is named instead.

No.EntrySectionLocatedProcessWhat it is
01The Canadian ShieldThe ShieldLabrador to the Northwest TerritoriesPrecambrian crust, glacially strippedExposed Precambrian rock over roughly half the country, scraped bare by ice and dimpled with the lakes the ice left.
02Why so many lakesThe ShieldBoreal Shield · Ontario, Manitoba, QuébecGlacial scour, incomplete drainageGlacial scour leaves closed hollows in hard rock, and there has not been time to fill or drain them.
03StriationsThe ShieldShield outcrops · Ontario, Québec, NWTSubglacial abrasionScratches gouged by rock frozen into the base of moving ice, all pointing the same way.
04The Bay of FundyThe Tides44.28° N, 66.35° W → 45.30° N, 63.78° WTidal resonanceThe tide rises and falls by up to about sixteen metres twice a day because the bay's resonant period nearly matches the tide's and the water sloshes like a bath.
05Burntcoat HeadThe Tides45.30° N, 63.80° WResonance at the bay headWhere the largest range is reliably measured, and how a tidal range is measured at all.
06The tidal boreThe Tides45.3° N, 63.5° WTranslating hydraulic jumpA wave that runs upstream against the river when the flood tide overtakes it.
07ResonanceThe Tides45.3° N, 63.9° WFrequency match, basin and tideThe bay amplifies because its length and depth give it a natural period close to the tide's.
08Virginia FallsCanyons61.6° N, 125.7° WAntecedent incisionOn the South Nahanni, the river drops roughly twice the height of Niagara into a canyon it cut faster than the mountains could rise around it.
09Antecedent riversCanyons61.0° N, 123.5° WIncision outpacing upliftA river older than the mountain range can saw down through it as it rises.
10KarstCanyonsNahanni · Vancouver Island · Rocky foothillsCarbonate dissolutionSoluble rock produces sinkholes, disappearing streams and caves.
11The Burgess ShaleFossil Ground51.4° N, 116.5° WMud slide, anoxic burialSoft-bodied Cambrian animals preserved in mud slides half a billion years ago — the best window that exists onto early animal life.
12Anomalocaris and OpabiniaFossil Ground51.4° N, 116.5° WCarbon-film preservationAnimals so unlike anything living that their first reconstructions were assembled wrongly, in pieces.
13Mistaken PointFossil Ground46.6167° N, 53.1667° WAsh fall over anoxic seafloorIn Newfoundland, an Ediacaran seafloor community preserved in place under volcanic ash, older than the Burgess Shale.
14Why soft tissue survivesFossil Ground51.4° N, 116.5° W · 46.6° N, 53.2° WRapid burial, mineral replacementRapid burial and oxygen-free mud stop decay before the animal falls apart.
15ErraticsIceJasper to Montana · Foothills Erratics TrainGlacial transport and depositionBoulders carried far from their parent rock and dropped where the ice melted.
16Prairie potholesIcePrairie Pothole Region · MB, SK, ABBuried ice blocks, collapseThousands of shallow depressions left by stranded ice blocks, now wetlands.
17Isostatic reboundIceHudson Bay · James Bay lowlandsMantle recovery under a lost loadThe crust is still rising where the ice sheet pressed it down, measurably each year.