on April 2, 2022
How many cleavage does olivine have?
Regional SpecificsThe specific gravity and hardness of the olivines are listed in the Table. There are at least two cleavages—i.e., the tendency to split along preferred crystallographic directions (perpendicular to the a and b axes in this case)—both of which are better-developed in the iron-rich varieties. Does olivine have a cleavage? Cleavage and fracture – Olivine
on April 2, 2022
How are Corried formed?
Regional SpecificsHow are corries formed simple? Corries form in hollows where snow can accumulate. The snow compacts into ice and this accumulates over many years to compact and grow into a corrie/cirque glacier. This then moves down hill because of gravity and the mass of the ice. How are corries and tarns formed? The glacier moves
on April 2, 2022
Why are Stratovolcanoes more explosive?
Regional SpecificsStratovolcanoes are more likely to produce explosive eruptions due to gas building up in the viscous magma. Andesite (named after the Andes Mountains), is perhaps the most common rock type of stratovolcanoes, but stratovolcanoes also erupt a wide range of different rocks in different tectonic settings. Why are stratovolcanoes more explosive than shield volcanoes? Due
on April 2, 2022
Where was the center of the earthquake?
Regional SpecificsThe location below the earth’s surface where the earthquake starts is called the hypocenter, and the location directly above it on the surface of the earth is called the epicenter. Where was the center point of the earthquake? The hypocenter is the point within the earth where an earthquake rupture starts. The epicenter is the
on April 2, 2022
What is the crystal structure of feldspar?
Regional SpecificsStructure. The structure of a feldspar crystal is based on aluminosilicate tetrahedra. Each tetrahedron consists of an aluminium or silicon ion surrounded by four oxygen ions. Each oxygen ion, in turn, is shared by a neighbouring tetrahedron to form a three-dimensional network. What is the crystal of feldspar? Most feldspar crystals are tabular and flattened
on April 2, 2022
What textures are possible in extrusive rocks?
Regional SpecificsExtrusive igneous rocks will have aphanitic, vesicular, glassy, or pyroclastic textures. What is the texture of extrusive rocks? Extrusive igneous rocks have a fine-grained or aphanitic texture, in which the grains are too small to see with the unaided eye. The fine-grained texture indicates the quickly cooling lava did not have time to grow large