on April 16, 2022
What does it mean if a rock has a fine texture?
GeologyFine-grained textures generally indicate magmas that rapidly cooled at or near the Earth’s surface. Fast cooling prevents crystals from growing very large. The cutoff between fine- and coarse-grained textures is about 1 mm. What is meant by a rock that has fine texture? The fine-grained texture indicates the quickly cooling lava did not have time
on April 16, 2022
What is a glacial valley called?
GeologyGlacial troughs, or glaciated valleys, are long, U-shaped valleys that were carved out by glaciers that have since receded or disappeared. Troughs tend to have flat valley floors and steep, straight sides. What are valleys called? Valleys are the low points between hills, and they are also known as vales. What is a flooded glacial
on April 16, 2022
Where does Dolomite come from?
GeologyDolomite is formed by the replacement of the calcite ions by the magnesium ions. Depending upon the ratio of the Mg ions in the crystal lattice they have different names (Figure 1). Modern dolomite formation has been found to occur under anaerobic conditions in supersaturated saline lagoons in Brazil. Where is dolomite found? Although rock
on April 16, 2022
How many eras are there in Earth’s history?
Geologythree erasthree eras, each of which includes a number of periods. They, in turn, are subdivided into epochs and stage ages. In an epoch, a certain section may be especially well known because of rich fossil finds. What are the 6 eras? It is subdivided into six periods, the Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and
on April 16, 2022
Is molten rock solid or liquid?
GeologyMagma is extremely hot liquid and semi-liquid rock located under Earth’s surface. When magma flows onto Earth’s surface, it is called lava. What is a molten rock? magma. This molten rock is called magma. Molten rock that reaches Earth’s surface is called lava. An igneous rock is classified on the basis of its mineral composition
on April 16, 2022
How do the Rocky Mountains differ from the Appalachian Mountains quizlet?
GeologyHow do the Rocky Mountains differ from the Appalachian Mountains? The Rocky Mountains are younger than the Appalachian Mountains. The Appalachian Mountains are in the East and the Rocky Mountains are in the West. What describes the land between the Rocky and Appalachian Mountains? The Intermountain Region a large area of dry land that is
on April 16, 2022
Where is coquina limestone found?
GeologySignificant deposits of coquina are found along the coasts of Florida and North Carolina. They also occur along the coasts of Australia, Brazil, Mexico and the United Kingdom. After deposition, calcium carbonate usually precipitates within the sediment. Where is limestone commonly found? Limestone-Forming Environments Most of them are found in shallow parts of the ocean
on April 16, 2022
How do you identify Mica?
GeologyThe mica minerals are distinguished by their perfect basal cleavage, which means that they are easily split into thin, often transparent, sheets. Two micas, biotite, and muscovite, are so common that they are considered rock-forming minerals.Aug 31, 2017 How would you identify a mica? The identification of a sheet of mica is never much of
on April 16, 2022
How is a left lateral strike slip fault different from a right lateral strike slip fault?
GeologyStrike-slip faults are vertical (or nearly vertical) fractures where the blocks have mostly moved horizontally. If the block opposite an observer looking across the fault moves to the right, the slip style is termed right lateral; if the block moves to the left, the motion is termed left lateral. What is the left lateral strike-slip
on April 16, 2022
What is the hardness of scoria?
Geology5-65-6 whereas its compressive strength is Not Available. Uses Of Scoria. A: A scoria is a cavity in igneous rock, caused by an escape of gas or steam. The difference is probably the It is relatively low density due to its vesicles, bu it is not as light as pumice. Is scoria hard or soft?