Friday, January 27, 2012

Nine Geologically Important Places Along side the Glooscap Trail in Nova Scotia

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By Todd Gracie


While the large Bay of Fundy tides erode the magnificent coastal cliffs and wash the shoreline lots of appealing rocks, fossils, zeolites, and also semi-precious stones are exposed. Having a amazing geology going back billions of years the Bay of Fundy is heaven for geologists.

The Glooscap Trail, given its name after the indigenous god who's believed to have produced Fundy’s fantastic tides, extends down the Bay of Fundy coastline between the provincial border towards Amherst and Windsor.

1. Milford - Low oval to dome-shaped hills, known as Drumlins, are made of sediment leveled and shaped by glaciers throughout the last 100,000 years in Nova Scotia. Drumlins make excellent farmlands. As well as the Milford and Shubenacadie areas of Nova Scotia, Halifax's Citadel Hill and the islands in Mahone Bay are examples of drumlins.

2. Noel Shore - Tightly folded Carboniferous sandstones and mudstones overlain by slightly tilted red Triassic sandstones and conglomerates are found along the Noel Shore. The line between these 2 sorts of rocks, known as an unconformity, can be seen at Wet Cove, near Pembroke. This unconformity signifies a gap of over 100 million years that's missing from these rocks.

3. Burntcoat Head - Found along the southern shore of the Minas Basin, Burntcoat Head is officially home to the highest tides ever recorded. On October 5, 1869 the most significant difference between low and high tide measured 54ft or 16.5m at Burntcoat Head.

Burntcoat Head is also a great location to view red Triassic sandstones and conglomerates, some of which display unique cross bedding made by currents of the streams that once flowed through this area.

4. Truro-Victoria Park - Victoria Park's Lepper River cuts thru Carboniferous sandstones built up in traditional streams.

5. Five Islands - Mi'kmaw legend claims that the native god Glooscap created these five islands - Moose, Diamond, Long, Egg and Apex - when he threw chunks of sod at Beaver. Signs throughout the park provide visitors with info about the region's geology and it is straightforward to spend the hours of low tide beachcombing. Sea dramatic cliffs with Jurassic lava flows covering essentially red Triassic sedimentary rocks, Jurassic sandstones and mudstones and a white layer that shows the border between the Triassic and Jurassic times - marking one of Earth's great extinction events.

6. Parrsboro - The largest community along the north shore of the Minas Basin, Parrsboro is an excellent place to witness the incredible power of the Fundy tides. These tides, the highest in the world, sculpt the shore daily revealing fossils, zeolites and semi-precious stones.

Canada's oldest dinosaur skeletons have been discovered in Jurassic sedimentary rocks near Parrsboro at Wasson Bluff. Rocks in this area are typically composed of complexly faulted and slanted Jurassic sediments and volcanics, making it difficult for the average beachcomber to see the fossils here.

Minerals like green celadonite, stilbite and chabazite can also be found throughout this region. Additionally, astounding perspectives can be enjoyed from the impressive basalt cliffs at Cape d'Or, near Advocate Harbour.

7. Port Greville - 2 tiny continental bits collided and slipped against each other roughly 390 million years ago to create what is now the Province of Nova Scotia. The boundary, called the Cobequid-Chedabucto Fault System, similar to California's San Andreas Fault, is a very important feature of geological and topographical maps of Nova Scotia. Where the Fundy lowlands meet the Cobequid Highlands, just north of Parrsboro at Crossroads, is a handy place to view this fault.

8. Cape Chignecto - Composed of 600-foot towering cliffs, 18 kilometres of spotless coastline, steep gulfs and old-growth forests, Cape Chignecto Provincial Park is located on the Western end of the Avalon Eco-Zone along the Bay of Fundy. Not only is the park a good spot to observe the tides, as they steadily lap at the base of the cliffs, Cape Chignecto is home to some of the province's most significant geological deep valleys.

As Fundy's forceful tides beat against and erode the Devonian-Carboniferous rocks at Cape Chignecto, a threesome of sea stacks, known as the Three Sisters, were created and stand watchfully over the Chignecto Bay.

9. Joggins - Found at the head of the Bay of Fundy, the 75-foot high cliffs at Joggins are exposed to constant tidal action and as Fundy's 50-foot tides erode the cliffs, new fossils are exposed including a rich assortment of flora, diverse amphibian fauna, significant trackways and some of the world's first reptiles. The Joggins Fossil Cliffs became well-known in 1851 with the discovery of fossilized tree trunks found in their original positions. When these trunks were closer inspected, miniscule bones were noticed which turned out to be one of the most important fossil findings in Nova Scotia. These remains were from one of the world's first reptiles and evidence that land animals had lived in the "Coal Age". Today the Joggins Fossil Cliffs are recognized in a top flight palaeontological site.




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