on April 2, 2022
Do crystals grow better in light or dark?
GeologyWarm air temperature aids water evaporation, causing the crystals to grow more quickly. Crystals will still grow in cooler temperatures, but it will take much longer for the water to evaporate. Crystal growth also requires light. Again, the crystals will eventually grow in the dark, but it will take a very long time. What makes
on April 2, 2022
How long does it usually take for a rock to undergo a stage within the rock cycle?
GeologyHow long does a stage of the rock cycle take? A conservative estimate is that each of these steps would take approximately 20 million years (some may be less, others would be more, and some could be much more). What is the journey of a rock through the rock cycle? The rock cycle is the
on April 2, 2022
What cements sedimentary particles together?
GeologyAt 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. After compaction and cementation the sedimentary sequence has changed into a sedimentary rock. What are the 3 main types of sedimentary rocks? Sedimentary rocks are formed from
on April 2, 2022
How do you identify gneiss?
Geologygneiss, metamorphic rock that has a distinct banding, which is apparent in hand specimen or on a microscopic scale. Gneiss usually is distinguished from schist by its foliation and schistosity; gneiss displays a well-developed foliation and a poorly developed schistosity and cleavage. What are some characteristics of gneiss? Gneiss is a medium- to coarse-grained, semischistose
on April 2, 2022
How long is San Andreas Fault?
GeologyWhere does San Andreas fault start and end? The San Andreas Fault System, which crosses California from the Salton Sea in the south to Cape Mendocino in the north, is the boundary between the Pacific Plate (that includes the Pacific Ocean) and North American Plate (that includes North America). How long will the San Andreas
on April 2, 2022
Why Oceanography is considered an interdisciplinary science?
GeologyOceanography, the branch of science that studies the physical and biological properties of the ocean, is considered interdisciplinary because it draws from multiple scientific fields. Is oceanography an interdisciplinary science? The study of oceanography is interdisciplinary. The ocean’s properties and processes function together. The chemical composition of water, for example, influences what types of organisms
on April 2, 2022
Where is Purbeck stone from?
GeologyDorseta series of limestone beds found in the Upper Jurassic to Lower Cretaceous Purbeck Group, found on the Isle of Purbeck, Dorset in southern England. The best known variety of this stone is Purbeck Marble. Is Purbeck Stone the same as Portland stone? Known as “Purbeck Portland” (or “Purbeck Cliff Stone”) the freestones long quarried
on April 2, 2022
What is abrasion in a river?
GeologyAbrasion – When pebbles grind along the river bank and bed in a sand-papering effect. Attrition – When rocks that the river is carrying knock against each other. They break apart to become smaller and more rounded. What is an abrasion in geography? Abrasion – this is when pebbles grind along a rock platform, much
on April 2, 2022
How is the use of radioactive decay in absolute dating similar to how you use a clock?
GeologyThe rate of decay for many radioactive isotopes has been measured and does not change over time. Thus, each radioactive isotope has been decaying at the same rate since it was formed, ticking along regularly like a clock. How is the use of radioactive decay in absolute dating similar to how U use a clock?
on April 2, 2022
What are the parts of a volcano definition?
GeologyDefinitions. Magma – Molten rock beneath Earth’s surface. Parasitic Cone – A small cone-shaped volcano formed by an accumulation of volcanic debris. Sill – A flat piece of rock formed when magma hardens in a crack in a volcano. Vent – An opening in Earth’s surface through which volcanic materials escape. What are the parts