about rocks Flashcards
what are generally groups of rocks classified into ?
igneous, sedimentary, Metamorphic
what question we ask to know the rocks ?
from what and where and how they formed
what igneous rocks made of
They are volcanic rocks formed from lava and magma ,and magma go to two types both of them their temperatures between 600ºC and 1,200ºC, but felsic is like honey think and movire sloley and have light color and it has +silica ,-calcium ,-iron ,-magnetism example for it granite , another is mafic is the opposite it it is lick hot coffee , dark , flow faster the oppsite in the matrila
igneous rocks how they form and where
they form from volcano magma it texture have clear and big crystal because it form slowly their name is Intrusive rocks have a coarse-grained texture pegmatitic texture and lava does not have clear crystal because it form so fast and it have fine
what sedimentary rocks made of
clastic sedminteray made of fragments of other rocks.
and
A chemical sedimentary rock is formed from mineral grains that precipitate by evaporation or another type of chemical event.
and Organic sedimentary rocks form from the remains of animals and plants. Organic sedimentary rocks often contain fossils.
how and where sedimentary rocks made of
in clastic sedmintary The other rocks are broken apart due to processes such as erosion and weathering.. The size and shape of the grains can tell a lot about where and how the rock formed.
A chemical sedimentary rock
may be a situation where a shallow inland sea slowly dried up, leaving the salt deposits behind. Rock salt is an example of a chemical sedimentary rock.,
Sedimentary rocks are usually formed in or around water. ,,,
how sedimentary rocks easily identifying
Many sedimentary rocks may show evidence of stratification. Stratification is the arrangement of sediment into layers. A sedimentary rock becomes stratified if there is a change in the type of rock that is being deposited.
from what Metamorphic rocks form?
they are ordinary rocks exposed to heat and pressur so eathir they igneous or sedimentary
Metamorphic how were they form
they are ordinary rocks exposed to heat and pressur so eathir they igneous or sedimentary
i do not understand (just in case )Metamorphic rocks
Metamorphic rocks form from heat and pressure applied to an existing rock.
Metamorphic rocks are also classified according to their composition and texture.
Metamorphic rocks can be foliated or nonfoliated. Foliated metamorphic rocks have grains arranged in bands. It is a thin, flat layering. Rocks such as gneiss, slate, schist, and phyllite show foliation.
Nonfoliated metamorphic rocks have randomly arranged mineral grains. They are not easily split into sheets. Marble and quartzite are examples of nonfoliated metamorphic rocks.
Metamorphic rocks often have the same composition as the rock from which they formed.
Marble, a nonfoilated metamorphic rock, is often used as building material. It has been found, though, that when exposed to acid rain, a marble statue will begin to wear away. That is because marble is limestone that has been changed. Limestone, of course, is composed of calcite, which is a mineral that dissolves in acid. This means that marble must also be composed of calcite. This metamorphic rock has retained the composition and properties of the original rock.
This is true for other metamorphic rocks. As you can see here, a sample of gneiss contains minerals very similar to the granite from which it formed. Slate forms from shale, and quartzite is similar to the sandstone that has been metamorphosed.
Rock formation can be explained by what?
tectonic plate movement.
igneous rocks and tectonic plate
igneous rocks form from lava , and it form from volcanic and volcanic form from subduction zone and subduction zone are from convergence boundaries ,Extrusive rocks are formed from volcanic eruptions.
Black sands are the result of the weathering of the igneous rock basalt that forms from the eruption of the volcanoes that formed the Hawaiian Islands. The Hawaiian Islands are the result of a hot-spot volcano. The Pacific plate has moved north-northwest over a hot spot in the mantle, located under the plate. The result is the Hawaiian island chain.
Basalt also makes up the oceanic crust now forming at spreading centers. Divergent plate boundaries, such as the Mid-Atlantic Ridge, allow lava to spill out on the ocean floor, cooling quickly into basalt.
