The phrase "active margin" is correct and usable in written English.
It is typically used in geological or geographical contexts to refer to the boundary between tectonic plates where significant geological activity occurs, such as earthquakes and volcanic eruptions.
Example: "The Pacific Ring of Fire is known for its active margin, which is characterized by frequent seismic activity."
Alternatives: "tectonically active zone" or "dynamic boundary".
The given correspondence table represents a standard cross table that enables a sorting of procedure number according to fields and regions, while presenting row and column marginal totals/sums (Active Margin).
Oregon has the steepest local slopes, but surprisingly few large failures for a seismically active margin (especially in the north), implying that slope angle and seismic activity may not be the most important slope stability controls.
A quarter of them are also active margin traders, creating a lucrative business for Matsui, which borrows at 0.6% and lends at 2.1%.
The sedimentary architecture of active margin basins, including back-arc basins, is known only from a few end-members that barely illustrate the natural diversity of such basins.
Using published age and paleogeographic constraints, we propose the presence of (1) a major early Paleozoic tectonic boundary that separates the Chinese Altay East Junggar multiple subduction systems of the southern Siberian active margin from those of the northern Tarim; and (2) a major Permian suture zone that separates the Tianshan Beishan from the northern active margin of the Tarim Craton.
The landmass may be a continent bordered by either a passive, aseismic margin (for example, the eastern margin of North America) or a seismically active margin like that found along the western coast of both North and South America.
However, similar examples have also been documented from tectonically active margins, e.g. Magdalena Fan.
The findings are consistent with data from studies on emerged reef terraces on tectonically active margins.
Although the continental slope averages about 4°, it can approach vertical on carbonate margins, on faulted margins, or on leading-edge, tectonically active margins.
In terms of geologic setting, Permian sediments deposited as thick sedimentary wedges along the tectonically active margins of the major cratons are least understood.
Marine Geology and Geophysics scientists study some of the most remote and forbidding parts of our planet, from the active margins beneath the oceans to the polar ice sheets.
