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This was the final episode of the Taconic orogeny. [1] Cameron's Line is the suture zone that is modern-day evidence of the collision of the island arc and the continent. [ 3 ] Cameron's Line winds southward out of New England into western Connecticut and passes through southern New York across the Bronx , following the general trend of the ...
1.94 South America Guriense orogeny: 2.8 2.7 South America Sunsás orogeny: 1.4 1.1 South America Cariri Velhos orogeny.54 South America Brasiliano-Pan African orogeny.54 South America Pampean orogeny.53 .48 South America Chonide orogeny.25 .20 South America Terra Australis Orogen.54 .23 South America Famatinian orogeny.49 .46 South America
The Taconic Unconformity, near Catskill, NY. The Taconic unconformity is a major unconformity created during the Taconic orogeny, exposed from eastern New York State to the Gaspe peninsula. [1] The orogeny was a long one that comprised multiple bursts; it primarily dated to the end of the Ordovician, and the underlying rocks are primarily this age.
When a tectonic phase occurred while sedimentation of new sediments continued, every new layer will have a slightly different dip from the one below. The result is a sequence of sediments that wedges out in one direction.
The Acadian orogeny is a long-lasting mountain building event which began in the Middle Devonian, reaching a climax in the Late Devonian. [1] It was active for approximately 50 million years, beginning roughly around 375 million years ago (Ma), with deformational, plutonic, and metamorphic events extending into the early Mississippian. [2]
In the Neoproterozoic most of the Earth's landmasses were united in the Rodinia supercontinent.The majority of its bulk consisted of the landmass of Gondwana. [Note 1] Near the end of the Neoproterozoic, during the breakup of this supercontinent, Laurentia [Note 2] and Baltica [Note 3] rifted from the western (Amazonian craton) and northern (African) margins of Gondwana respectively.
Laurentia basement rocks. Laurentia or the North American Craton is a large continental craton that forms the ancient geological core of North America.Many times in its past, Laurentia has been a separate continent, as it is now in the form of North America, although originally it also included the cratonic areas of Greenland and the Hebridean terrane in northwest Scotland.
Reconstruction of how the Iapetus Ocean and surrounding continents might have been arranged during the late Ediacaran period. The Iapetus Ocean (/ aɪ ˈ æ p ɪ t ə s /; eye-AP-ih-təs) [1] existed in the late Neoproterozoic and early Paleozoic eras of the geologic timescale (between 600 and 400 million years ago).