The McCoy Brook Formation is a geological formation dating to roughly between 200 and 190 million years ago and covering the Hettangian to Sinemurian stages . The McCoy Brook Formation is found in outcrops around the Bay of Fundy , Nova Scotia .
12-634: The McCoy Brook Formation rests on the North Mountain Basalt , one of the volcanic flows associated with the Triassic – Jurassic boundary in the Newark Supergroup . The base of the McCoy Brook Formation is probably within 100,000 to 200,000 years of the boundary. This thin unit (9 m) of lacustrine sediments is preserved in six small synclinal outcrops around Scots Bay on the west side of
24-611: A Tuath ) is a narrow southwest-northeast trending volcanic ridge on the mainland portion of southwestern Nova Scotia , stretching from Brier Island to Cape Split . It forms the northern edge of the Annapolis Valley along the shore of the Bay of Fundy . Together with South Mountain , the two ranges form the Annapolis Highlands region. North Mountain rises dramatically from the valley floor and tapers somewhat more gradually to
36-532: A narrow (~2 cm) rhyolite band. The layering of the flow closely resemble that of some Hawaiian lava lakes . Columnar basalt may be seen at Baxters Harbour and at Brier Island . Digby Neck Digby Neck is a Canadian peninsula extending into the Bay of Fundy in Digby County , Nova Scotia . Digby Neck is the western extension of the North Mountain range from the Annapolis Valley and
48-467: A right Dentary. A tritheledontid cynodont , found in the layers of the Scots Bay member. Pachygenelus cf. P. monus Wasson Bluff Upper Member Excellently preserved fragments of two premaxillae, ten maxillae, and six dentaries A tritheledontid cynodont Tritylodontidae Indeterminate Wasson Bluff Scots Bay Member Right humerus A tritylodontid cynodont , found in
60-509: Is a gigantic flood basalt and intrusive complex along east coast of the United States , Europe , northwest Africa and South America with a diameter of 4,000 km. A viscous (<175 m) North Mountain flow at McKay Head shows ~25-cm-thick distinguished layers separated by ~130 centimeter of basalt in its upper 34 meters. Upper layers (5 meters below the lava top) are extremely vesicular while lower ones are pegmatitic and include
72-820: Is composed of algal Stromatolites , Oncolites , Charophyta , Ostracoda , Gastropoda , Conchostraca , fish bones, calcispheres and logs. cf. Hybodus Indeterminate Wasson Bluff Scots Bay member Teeth & Coprolites A hybodont shark. Recovered from lacustrine facies ? Redfieldiid None designated Wasson Bluff Scots Bay member Scales and skull bones Found in lacustrine limestone and lacustrine basalt aggregate aff. Semionotus sp. None designated Wasson Bluff Scots Bay member Disarticulated remains Found in lacustrine limestone, lacustrine basalt aggregate, and lacustrine mudstone Cynodontia Indeterminate Wasson Bluff Scots Bay Member A cynodont Oligokyphus Oligokyphus sp. Wasson Bluff Scots Bay Member Fragment of
84-735: Is made of two thick lava flows. It is separated from the eastern portion of the North Mountain by a deep, tidal channel, the Digby Gut . Along with Long Island and Brier Island , it forms the northwest shore of St. Mary's Bay . The westernmost community on the Digby Neck is East Ferry , opposite Tiverton on Long Island to the west. The "Petit Passage" separates Long Island from the Digby Neck. Andrew & Friedel. "Digby Neck Ferries" . Nova Scotia Travel Guide . Retrieved 5 February 2018 . In September 2008 Hurricane Kyle made landfall on
96-460: The Triassic period when this part of Nova Scotia occupied the center of the supercontinent Pangaea . It is a 201 million year old sequence of tholeiitic basalts , which contains columnar jointing. The basalts also extend under the Bay of Fundy and parts of it are exposed on the shore at Five Islands , east of Parrsboro on the north side of the bay. Numerous sediment-filled fissures are present near
108-628: The Blomidon Peninsula. Originally named as the Scots Bay Formation , it is now correlated with the lowermost part of the McCoy Brook Formation, where it is referred to as the Scots Bay Member . The Scots Bay Member accumulated in an aerobic lake on the floor of the subtropical Fundy Rift Valley , associated with Silica-rich Hydrothermal Springs derived from the CAMP vulcanism, where the biota
120-488: The layers of the Scots Bay member. Clevosaurus C. bairdi Wasson Bluff Lower McCoy Brook Formation Partial skulls and jaws, isolated cranial bones, partial postcranium , postcranial bones A sphenodontian of relatively small size, found in fluvio-lacustrine sandstone and mudstone, and basalt agglomerate North Mountain Basalt North Mountain (French: Montagne du Nord ; Gaelic: Beinn
132-509: The north and west where it meets the coast, although many parts of this coast have vertical cliffs rising higher than 30 metres, most notably at Cape Split. A break occurs at Digby Gut where a gap in the mountain ridge is filled by a deep tidal channel separating the eastern end of the mountain from Digby Neck . The highest point on the ridge is at Mount Rose in Annapolis County , north of Lawrencetown . The ridge traces its history to
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#1732894498135144-589: The upper surface of North Mountain. The hard ridge of basalt resisted the grinding of ice sheets that flowed over the region during past ice ages , and now forms one side of the Annapolis Valley in western part of the Nova Scotia peninsula . North Mountain is believed to have formed during the opening of the Atlantic Ocean . It is a portion of the Central Atlantic Magmatic Province , which
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