Rocks and Soil

About Rock :
http://www.historyforkids.org/scienceforkids/geology/rocks/index.htm

http://jenis-batuan-dan-mineral-di-alam.blogspot.com/2008/12/jenis-jenis-batuan-di-alam_11.html

http://inani.tripod.com/batu.htm

Rock picture gallary can see on http://geology.about.com/library/bl/images/blrockindex.htm

IGNEOUS ROCK PICTURES (About Igneous Rocks)
Aa—A rugged form of basalt lava.
Andesite—The typical intermediate arc lava.
Anorthosite—A rare plutonic feldspar-only rock.
Basalt—A bubbly, crystally chunk of this igneous rock from Kilauea.
Basalt is an extrusive or intrusive rock that makes up most of the world's oceanic crust. This specimen was erupted from Kilauea volcano in 1960.
Diorite—A plutonic rock between granite and gabbro.
Felsite—The volcanic version of granite.
Gabbro—The crystallized, plutonic version of basalt.
Granite—The rock that makes up the bulk of the continents.
Granite consists of quartz (gray), plagioclase feldspar (white) and alkali feldspar (beige) plus dark minerals like biotite and hornblende.
Granodiorite—Almost diorite, except that this rock has quartz.
Lapillistone—A volcanic rock formed of little ash balls.
Obsidian—A useful volcanic glass.
Obsidian is an extrusive rock: lava that cooled without forming crystals, giving it a glassy texture.
Pahoehoe—Smooth-skinned flows of basalt lava.
Pegmatite—The igneous rocks with the biggest crystals.
Peridotite—Dark, dense, rarely seen rock from the Earth's mantle.
Perlite—A lightweight volcanic rock of great usefulness.
Porphyry—An igneous rock with large mineral grains in a fine matrix.
Pumice—A rock made from volcanic eruption products.
Pyroxenite—An uncommon ultramafic rock from the deep sea crust.
Quartz Monzonite—Just like granite, except it's short on quartz.
Rhyolite—The lava type with the highest silica content.
Scoria—A frothy volcanic product much like pumice.
Syenite—A plutonic, alkalic "granite-without-quartz."
Tuff—A rock made from volcanic ash.

Sedimentary rocks
Sedimentary rocks form at or near the Earth's surface. Rocks made from particles of eroded sediment are called clastic sedimentary rocks, rocks made from the remains or living things are called biogenic sedimentary rocks, and those that form by minerals precipitating out of solution are called evaporites.
Agate—A semiprecious chert of infinite variety.
Alabaster—A white gypsum stone long prized for sculpture.
Arkose—A raw sandstone made from eroded granite.
Asphalt—Natural, from a natural oil seep.
Banded Iron Formation—Extremely ancient "tiger iron."
Breccia—Rock made from broken rocks, breccia has many forms.
Chert—A common siliceous rock type with much variety.
Coal—The original fossil fuel.
Conglomerate—Rocks made with extra-big grains.
Coquina—A limestone made from shell fragments.
Dolomite—An altered near-twin of limestone.
Graywacke—An impure sandstone also called wacke.
Gypsum Rock—A crusty chunk from a Nevada roadside.
Limestone—The greatest carbon-bearing rock.
Limestone is usually made of the tiny calcite skeletons of microscopic organisms that once lived in shallow seas like today's Bahamas.
Peat—Brown, vegetative precursor to coal.
Rock Salt—The only edible stone.
Sandstone—Where sand goes to and comes from.
Sandstone forms where sand is laid down and buried—beaches, dunes and seafloors. Usually sandstone is mostly quartz.

METAMORPHIC ROCK PICTURES (About Metamorphic Rocks)
Amphibolite—High-grade rock, typically a hornblende schist.
Blueschist—Rock made by high-grade metamorphism in subduction zones.
Cataclasite—A ground-up rock found in fault zones.
Eclogite—The most extreme metamorphic rock you can find.
Gneiss—Banded, tough, it forms the lower crust.
Greenschist—Rock made by low-grade metamorphism of various rock types.
Greenstone—A dark rock made by metamorphism of basalt.
Hornfels—Tough and fine-grained, it forms where igneous rocks cook it.
Marble—The metamorphic version of limestone.
Marble is made by regional metamorphism of limestone or dolomite rock, causing their microscopic grains to combine into larger crystals
Migmatite—A swirly rock produced by extreme metamorphism.
Mylonite—A milled and melted rock from deep in fault zones.
Phyllite—Shiny, colorful rock made by metamorphism of slate.
Quartzite—Rugged rock made by metamorphism of sandstone.
Quartzite is a tough stone composed mostly of quartz. It may be derived from sandstone or chert by regional metamorphism
Schist—Striped rock made by metamorphism of mudstones.
Serpentinite—Green, scaly metamorphosed ocean crust.
Slate—Platy rock made by early metamorphism of shale.
Slate is the lowest grade of metamorphic rock, with a dull luster and strong cleavage. It is derived from shale by regional metamorphism
Soapstone—Soft and carvable, hydrothermally altered lava.
Shale—Rock made from mud and clay.
Siltstone—Made from sediment finer than sand.
Travertine—A form of limestone created in springs.