Tuesday, August 9, 2011

Eight Geologically Important Places Along side the Evangeline Trail in Nova Scotia

By Tom Moore


As the giant Fundy tides wear away the towering sea cliffs and wash the shores many interesting rocks, fossils, zeolites, and semi-precious stones are disclosed. With its fascinating geology dating back hundreds of millions of years the Bay of Fundy is paradise for geologists.

The Evangeline Trail, located along Nova Scotia’s Fundy coast in between Yarmouth and Windsor, is termed after Longfellow’s poem Evangeline: A Tale of Acadie who was impressed by the Acadian culture evident in this part of Nova Scotia.

1. Cape Forchu - "Cape Forchu, found near Yarmouth and popular among tourists for its apple core shaped lighthouse, shows evidence of Nova Scotia's once active volcanoes. Cape Forchu is comprised of Silurian volcanic rocks.

2. Cape St. Mary - The cliffs at Cape St. Mary, a part of Nova Scotia's French Acadian shoreline, are made up of metamorphosed sedimentary rocks coming from the Cambrian-Ordovician era. Comparable rocks may be uncovered along bits of the Lighthouse Route (the Blue Rocks) and the Marine Drive (Taylor Head).

3. Digby - A fold in Cambrian-Ordovician rocks is visible just off of Hwy 101 close to Digby.

4. Digby Neck and the Islands - Both Brier and Manhattan are made from Jurassic basalt lava. As the lava cooled, it often formed vertical polygonal columns such as Balancing Rock in Tiverton.

5. North Mountain Shore - Spectacular cliffs and headlands, shaped by Jurassic basalt lava flows, are very common in this region of Nova Scotia. The vesicular tops of those flows made the best environment for the development of mineral crystals like zeolites, amethyst and agates. Towns well-liked because of their mineral crystals are Harbourville, Halls Harbor and Scots Bay.

6. Blomidon - More than 200 million years back, when Nova Scotia was located in the subtropics, red Triassic sedimentary rocks developed in lakes and brooks in what's currently the Province's Annapolis Valley. Those rocks make up the cliffs seen in this region, including those in Blomidon.

7. Blue Beach - Sandstones and mudstones deposited on the shores of Carboniferous period lakes made Nova Scotia's Blue Beach. Geological attractions at Blue Beach comprise of 350 million year old ripple marks, raindrop prints, fossil plants, fish scales and amphibian footprints.

8. St. Croix - People travelling down Hwy 101 from Halifax will be able to watch the white gypsum cliffs at St. Croix. Similar to the salt excavated at Pugwash and the limestones along the banks of the Kennetcook Stream, St. Croix gypsum forms a sedimentary deposit of the tropical "Windsor Sea" which covered this region in the Carboniferous era. Sea life, like horn corals present in limestone, thrived in this "sea".




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