How does downwelling affect marine life?
Regional SpecificsFew benthic animals would survive such toxic conditions. In the most extreme cases, a lack of downwelling may lead to mass extinctions. Paleontologists have suggested that 250 million years ago, deep circulation slowed nearly to a stop, and the ocean began to stagnate. How do downwelling affect ocean life? In the most extreme cases, a
Why are some continental margins active and others passive?
Regional SpecificsThe distinction between active and passive margins refers to whether a crustal boundary between oceanic lithosphere and continental lithosphere is a plate boundary. Active margins are found on the edge of a continent where subduction occurs. Why are continental margins passive? The continents moved away from one another as parts of different tectonic plates. The
Why do we study igneous rocks?
Geology & LandformBy carefully analyzing igneous rocks and interpreting the information they contain, we can deduce processes that take place within the earth and we can understand volcanic processes that take place on the earth’s surface. The study of igneous rocks enables us to understand the igneous part of geologic history. What is the study of igneous
What is conservative margin?
Regional SpecificsA conservative (passive or transform as it is also known) plate margin involves two tectonic plates sliding past each other. The plates do not pass each other smoothly. Friction causes them to get stuck. Over time pressure builds up until the friction is overcome which results in the plates slipping. What does conservative margin mean?
Who first presented the periglacial cycle of erosion?
Regional SpecificsIn 1950 L.C Peltier put forward the concept of a periglacial cycle of erosion. Who propounded glacial cycle of erosion? William Morris Davis However the immediate influences of William Morris Davis, the creator of the cycle of erosion model, were 19th century American explorers. Who was the first to give the idea of cycle of
Why is sequence stratigraphy important?
Regional SpecificsSequence stratigraphy can be used to develop more accurate surfaces for mapping and correlating facies; predict reservoir, source and sealing facies; identify stratigraphic traps; and project reservoir trends into areas with limited data. Why principles of stratigraphy is important? stratigraphy, scientific discipline concerned with the description of rock successions and their interpretation in terms of