Tuesday, September 6, 2011

Eight Geologically Remarkable Areas Up and down 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 composed of metamorphosed sedimentary rocks out of the Cambrian-Ordovician era. Comparable rocks may be discovered along parts 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 Long Island are created of Jurassic basalt lava. When the lava cooled down, it frequently created vertical polygonal columns like Balancing Rock in Tiverton.

5. North Mountain Shore - Dramatic cliffs and headlands, formed by Jurassic basalt lava flows, mark this area of Nova Scotia. The vesicular tops of these flows created the perfect setting for the formation of mineral crystals such as zeolites, amethyst and agates. Communities popular for their mineral crystals include Harbourville, Halls Harbour and Scots Bay.

6. Blomidon - Over 200 million years ago, when Nova Scotia was in the subtropics, red Triassic sedimentary rocks formed in lakes and streams in what is now the Province's Annapolis Valley. These rocks form the cliffs found in this area, 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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