Difference Igneous Out Products Of Mount Semeru and Kelud

The lithosphere is derived from lithos and sfer/fer/faira. Lithos meaning stone and fer means layers. Thus the lithosphere means rock. Is the science that study it's Geology. A branch of Geology which studies rocks is called Petrology. The branch of Geology which studies the minerals or mineral is called Mineralogy. Was the study of crystals is called Kritalogi. 

The lithosphere is often called the skin of the Earth/Earth's crust (crust). The parent of all the rocks in the lithosphere is the magma (molten rock). According to the process of occurrence and its formation, the rock in the face of the Earth are classified into three groups of rocks. Rocks-rocks are:

1. igneous rocks
2. rocks of sedimentary deposits/(other rock)
3. Metamorphic Rocks

Igneous rocks (igneous rock rock) is a rock that is formed because the magma freezes through a process of cooling. Based on the freezing of magma, igneous is distinguished into three kinds, namely: 

Igneous in (inner igneous rock rock) is formed in igneous magma (batholit), located deep within the Earth and having the process cooling in a very long time. The rock is often called the rocks the rocks of the abisis plutonic rocks/.

1. igneous korok/gang/porfirik (' korok'igneus rock or hypabyssal rock) are the igneous rocks formed in the korok/gang/the pipes drain a volcano (in diatrema) or in the formation of other intrusion.
2. igneous out/efusif (outer igneous rock rock/effusive rock) are the igneous rocks formed in the Earth's surface with a relatively quick process of freezing.

For the next study we only leads to igneous. Considering the formation of this rock in a relatively quick, of rocks has its crystal grain characteristics: subtle, even amorphous and partially exposing the holes the former existence of a trapped gas.

One example is andesitic igneous rocks out. Andesite according to Bagja Waluya (2007: 110) was "rock leleran of diorit, fine-grained minerals, the composition mineralnya with diorit, grey". Next Bagja Waluya mentions that the volcano in Indonesia produces rocks andesite lava in the form of piroklastika. A lot of rocks andesite containing hornblende andesite called hornblenda, while many contain piroksin called andesite piroksin.

As such, the two images that according to the rock seems to me is an andesitic rock. The image below is the outer product of igneous mountain most high and most active on the island of Java, i.e. volcanoes Semeru. Characteristics of rock colors gray "kehijau-biruan: java-language". Are the images of the outer product of igneous kelud which shows the typical grey colour rocks andesite. Both volcano is a mountain range in Central Java to the 

East, including on the bow of the Sunda arc--Banda, extract from sirkum the Mediterranean. Even the two volcanoes in East Java province was only a straight km in the past, the rocks of the andesite is used for materials of the temple. One example in candi Penataran at mBlitar. Being at the moment, these rocks are widely used for building foundations, paved roads, as well as speaker for the construction of the concrete. 

Rocks of andesite unsweetened/sheet used for stone decorations on the walls of the settlements are located.