<span>Ore deposits of the element Aluminium do not require extreme concentrations because it is one of the most abundant elements in the earth's crust.
</span><span>Aluminium is the most common metal in the </span><span>Earth's crust.
</span>However aluminium can not be found free stand alone. All of the earth's aluminum<span> is combined with other elements to form compounds.</span>
Igneous rocks -
1. texture, can be smooth, fine-grained, coarse-grained, glassy, or porphyritic.
2. origin, geologists use this to study to know where it was found, like it could be formed by hardened magma under the earth's surface.
3. mineral composition, some of these rocks had other minerals that help us find all the exact minerals. (like a tree diagram)
Sedimentary Rocks-
1. the only rocks with fossils, trace fossils, or sedimentary features.
2. composed of strata (layer) or laminations (bed)
3. sedimentary rocks have grains instead of crystals.
4. Metamorphism destroys fossil evidence and lava destroys its organic material before the fossilation can take place.
Metamorphic Rocks-
1. rarely have fossils & they are classified by these textures and compositions
2. they can react with acid. may or may not have a curved or bent foliation
3. can be formed w/ only one mineral & they rarely have pores or openings.
In coastal areas during the summer season, the land heats up
more than of the adjacent body of water during the—letter c, daylight hours. It
is because the land has absorb and has lost energy of heat quickly than of the
body of water.
Pyroclasts refers to ash, rock fragments and volcanic bombs ejected during volcanic eruption. When pyroclasts mix with super-heated gases ejected during volcanic eruption, this results in pyroclastic flow. Pyroclasts may then mix with water as it flows down the volcano. This gives rise to lahars which is a fast flowing mudflow created through the combination of pyroclasts(ash) and water. Thus, the combination of ash(pyroclasts) and water is called lahars.
NOTE: pyroclasts refers to ash
