2007-03-05 06:48:29 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
In addition to cooling rate, which is related to depth is emplacement or extrusion onto the surface of the Earth, another important factor in some igneous rocks (i. e. pegmatites) is the catalyzing effects of volatiles such as water or fluorine. Volatiles can transport elements rapidly, thus making very large crystals. An example of a pegmatite (The Hardin Pegmatite east of Taos, NM) had a single crystal of calcite over twenty meters long and two beryllium crystals the size of VW minibuses.
2007-03-05 10:44:42 · answer #1 · answered by Amphibolite 7 · 0⤊ 0⤋
cooling rate which usually relates to depth of burial. Rocks which cool from a magma at some depth below the Earth cannot lose heat quickly. This gives time for the crystals in the rock to grow. PS....I hope this is not your homework. !!
2007-03-05 07:57:11 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Cooling rate. Faster cooling = smaller crystals. Slower cooling = larger crystals.
2007-03-05 10:44:25 · answer #3 · answered by Ayame 3 · 1⤊ 0⤋
it rather is in basic terms like one identifies cats, dogs and bears etc. or like a undertaking confronted with the help of a individual traveling yet another united states and seing end result that he has by no potential considered in his very own united states. To be short, those 3 varieties of rocks have a sequence of function seen residences and mode of incidence which helped in figuring out them into sedimentary, igneous and metamorphic communities. from time to time it is not that basic to accomplish that somewhat in circumstances of transitional or mixed rocks. The assessments are required in basic terms after we could desire to classify the rock extra interior the gang or desire to earnings extra for its genesis information and fiscal importance etc. thnks
2016-12-18 15:53:33 · answer #4 · answered by Anonymous · 0⤊ 0⤋
cooling rate
2007-03-05 06:50:55 · answer #5 · answered by Your Best Fiend 6 · 1⤊ 1⤋