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English: How Earth's tectonic plates and lands may have been positioned and moved in the past: an animated video of a full-plate tectonic model extended one billion years into the past. It is a result of the 2020 study "Extending full-plate tectonic models into deep time".
William Guidara (born 1979) is an American restaurateur based in New York City. Along with chef Daniel Humm , Guidara co-owned the Make It Nice hospitality group, established in 2011, which owns and operates Eleven Madison Park , NoMad New York , NoMad Los Angeles, NoMad Las Vegas, NoMad Bar and Made Nice.
While a previous plate tectonic model shows a counterclockwise rotation of the Arctic Alaska-Chukotka microplate away from the Canadian Arctic margin, zircon data suggests that the Chukotka part of the microplate originated closer to the Taimyr and Verkhoyansk (east of the Polar Urals) and not from the Canadian Arctic.
This article describes techniques; for a history of the movement of tectonic plates, see Geological history of Earth.. Plate reconstruction is the process of reconstructing the positions of tectonic plates relative to each other (relative motion) or to other reference frames, such as the Earth's magnetic field or groups of hotspots, in the geological past.
Plate tectonics (from Latin tectonicus, from Ancient Greek τεκτονικός (tektonikós) 'pertaining to building') [1] is the scientific theory that Earth's lithosphere comprises a number of large tectonic plates, which have been slowly moving since 3–4 billion years ago.
In 1977 researchers M. Kumazawa and Y. Fukao [1] introduced the term "mesoplate" in the context of what they termed a "Dual Plate Tectonic Model." Their rationale is a postulated low-velocity zone near and above the 650 km discontinuity with additional properties including local low melting temperature, active chemical migration and fractionation, and low-viscosity.
One model has the Seattle and Tacoma faults converging at depth to form a wedge, which is being popped up by approximately north–south oriented compression that ultimately derives from plate tectonics. [19] Another model (see diagram) interprets the Seattle Uplift as a sheet of rock that is being forced up a ramp. [20]
[11] [50] Evidenced together by a large doming structure, widespread of komatiites and bimodal volcanism, it is proposed that plume tectonics is the major crust-forming process in the Archean. [11] This has led to further research on the beginning of plate tectonics and numerical modeling of the early Earth condition. [50] [51]