Is plagioclase feldspar a silicate?
GeologyPlagioclase is a series of tectosilicate (framework silicate) minerals within the feldspar group. Rather than referring to a particular mineral with a specific chemical composition, plagioclase is a continuous solid solution series, more properly known as the plagioclase feldspar series. Is plagioclase feldspar silicate or non silicate? The vast majority of the minerals that make
What is the Tertiary period known for?
GeologyThe Tertiary witnessed the dramatic evolutionary expansion of not only mammals but also flowering plants, insects, birds, corals, deep-sea organisms, marine plankton, and mollusks (especially clams and snails), among many other groups. What major events occurred during the Tertiary Period? The Tertiary Period began abruptly when a meteorite slammed into the earth, leading to a
How useful is the volcanic explosivity index?
GeologyIt is very valuable because it can be used for both recent eruptions that scientists have witnessed and historic eruptions that happened thousands to millions of years ago. The primary eruption characteristic used to determine the volcanic explosivity index is the volume of pyroclastic material ejected by the volcano. What is the Volcanic Explosivity Index
What is turbidity in geology?
Geology questionsTurbidity is a measure of the level of particles such as sediment, plankton, or organic by-products, in a body of water. As the turbidity of water increases, it becomes denser and less clear due to a higher concentration of these light-blocking particles. Where is turbidity located? Turbidites are deposited in the deep ocean troughs below
What does a longer time interval mean about the locations distance to the epicenter?
GeologyHow does the ps time interval change with distance from the epicenter? With increasing distance from the earthquake, the time difference between the arrival of the P waves and the arrival of the S waves increases. Put more simply, the higher the time between the S and P waves (the S-P interval), the farther the
What is the name for plants that survive a major disturbance?
Geologywhat is the name for plants that survive a major disturbance? they are called survivors, and they served as important sources of seed to establishing a future forest inside the blast zone. What is the name for plants that survive a major disturbance What was their role in regenerating the disturbed area *? Terms in
Where is most of Earth’s new crust found?
GeologyOceanic crust is constantly formed at mid-ocean ridges, where tectonic plates are tearing apart from each other. As magma that wells up from these rifts in Earth’s surface cools, it becomes young oceanic crust. The age and density of oceanic crust increases with distance from mid-ocean ridges. Where does most of the Earth’s crust form?
How many types of systems are studied in earth science?
GeologyThe five systems of Earth (geosphere, biosphere, cryosphere, hydrosphere, and atmosphere) interact to produce the environments we are familiar with. What are the 4 systems of Earth science? The earth system is itself an integrated system, but it can be subdivided into four main components, sub-systems or spheres: the geosphere, atmosphere, hydrosphere and biosphere. What
What are the two layers of the mantle?
GeologyThe mantle has two main parts, the upper mantle and the lower mantle. The upper mantle is attached to the layer above it called the crust. Together the crust and the upper mantle form a fixed shell called the lithosphere, which is broken into sections called tectonic plates. What are the 2 layers of the
What forms the continental rise?
GeologyContinental rises form as a result of three sedimentary processes: mass wasting, the deposition from contour currents, and the vertical settling of clastic and biogenic particles. What are continental rises mostly made of? A continental rise consists mainly of silts, mud, and sand, deposited by turbidity flows, and can extend for several hundreds of miles