on April 14, 2022
What is the layer of the mantle?
GeologyThe mantle is divided into several layers: the upper mantle, the transition zone, the lower mantle, and D” (D double-prime), the strange region where the mantle meets the outer core. The upper mantle extends from the crust to a depth of about 410 kilometers (255 miles). What is the layer mantle made of? silicate rocks
on April 14, 2022
Which sedimentary rock is formed by compaction and cementation of land derived sediments?
GeologyShaleShale = clastic; silicate; formed by compaction and cementation of MICROSCOPIC land derived sediments. Are sedimentary rocks formed from compaction and cementation? This process is called compaction. At the same time the particles of sediment begin to stick to each other – they are cemented together by clay, or by minerals like silica or calcite.
on April 14, 2022
Is Granite foliated?
GeologyGranitic Foliated Gneiss. Gneiss is a metamorphic rock formed by changing schist, granite, or volcanic rocks through intense heat and pressure. Gneiss is foliated, which means that it has layers of lighter and darker minerals. What type of rock is granite? Granite is an igneous rock that forms when magma cools relatively slowly underground. It
on April 14, 2022
What is a depositional sequence?
GeologyA depositional sequence is defined as a relatively conformable succession of genetically related strata bounded by subaerial unconformities or their correlative conformities. What is the sedimentary sequence? Sedimentary sequences are layers of rock which are derived from weathered rocks, biogenic (= of living organisms) activity, or precipitation from solution. What is transgressive sequence? A transgression
on April 14, 2022
Is Basalt A igneous sedimentary or metamorphic rock?
Geologyextrusive igneous rockigneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the surface of a rocky planet or moon. More than 90% of all volcanic rock on Earth is basalt. Is basalt igneous or sedimentary or metamorphic? igneous rock What is Basalt?
on April 14, 2022
How can you prepare for an earthquake in California?
GeologySix Ways to Plan Ahead Check for Hazards in the Home. Fasten shelves securely to walls. … Identify Safe Places Indoors and Outdoors. Under sturdy furniture such as a heavy desk or table. … Educate Yourself and Family Members. … Have Disaster Supplies on Hand. … Develop an Emergency Communication Plan. … Help Your Community
on April 14, 2022
What’s an intrusive igneous rock?
GeologyIntrusive Igneous Rock Intrusive, or plutonic, igneous rock forms when magma remains inside the Earth’s crust where it cools and solidifies in chambers within pre-existing rock. The magma cools very slowly over many thousands or millions of years until is solidifies. What is intrusive igneous rock? Intrusive Igneous Rocks: Intrusive, or plutonic, igneous rock forms
on April 14, 2022
Is Mount okmok active?
GeologyOkmok is one of the most active volcanoes in the Aleutian island chain (Alaska). It consists of a complex of shields truncated by a caldera and several active vents inside the caldera, which have built small cones and lava flows. Is the Okmok volcano active? The documented eruption of 1945 occurred at a cinder cone
on April 14, 2022
Where does convergence occur?
GeologyAt the surface, low pressure systems have a counterclockwise rotation in the Northern Hemisphere, with the wind turning slightly inward towards the lowest pressure. This causes air to converge, or come together, at the center of the low near the ground. Where do convergence and divergence occur? The level of nondivergence (LND) is so called
on April 14, 2022
What type of eruption is a cinder cone?
GeologyCinder cones are the simplest type of volcano. They are built from particles and blobs of congealed lava ejected from a single vent. As the gas-charged lava is blown violently into the air, it breaks into small fragments that solidify and fall as cinders around the vent to form a circular or oval cone. What