Igneous Rock Identification Quiz

Diorite is an igneous rock formed from the cooling and solidification of magma or lava. Sedimentary rocks are formed from the accumulation and lithification of sediments. Metamorphic rocks are formed from the alteration of existing rock types due to high heat and pressure. Volcanic rocks are formed from lava that has erupted onto the Earth's surface.

Gabbro is a type of igneous rock formed from the slow cooling of magma deep underground. It is composed mainly of calcium-rich plagioclase feldspar and pyroxene minerals.

Granite is formed by the cooling of magma within the Earth's crust, making it an example of an Igneous Rock. Sedimentary Rock is formed by the accumulation and compression of sediment, Metamorphic Rock is formed by the alteration of existing rock through heat and pressure, and Extrusive Rock is formed from lava cooling quickly on the Earth's surface.

Obsidian is formed from rapidly cooling lava and is classified as an igneous rock.

Peridotite is a type of igneous rock formed deep within the Earth's mantle through slow cooling and crystallization. Igneous rocks are formed through the solidification of magma or lava.

Pumice is a type of igneous rock formed from volcanic eruptions.

Rhyolite is an example of an igneous rock, which is formed through the cooling and solidification of magma or lava.

Scoria is formed from solidified lava and is classified as an Igneous Rock.

Hornfels is classified as a type of metamorphic rock, which means it has been subjected to high heat and pressure without actually melting.

Marble is a metamorphic rock formed from limestone under extreme heat and pressure.

Novaculite is a type of metamorphic rock formed from the recrystallization of microcrystalline quartz.

Phyllite is a type of metamorphic rock that is formed from the metamorphism of slate.

Quartzite is a metamorphic rock formed from sandstone under extreme heat and pressure, making it different from igneous and sedimentary rocks. Rock Salt is a type of sedimentary rock formed from evaporated saltwater.

Schist is a type of metamorphic rock formed from pre-existing rock subjected to heat and pressure.

Slate is a fine-grained, foliated metamorphic rock that forms from the metamorphism of shale.

Soapstone is a metamorphic rock that is composed primarily of talc, with varying amounts of chlorite, pyroxenes, micas, amphiboles, carbonates, and other minerals. It is commonly used to make countertops, sinks, and other objects due to its heat-resistant and stain-resistant properties.

Breccia is a type of sedimentary rock formed from angular rock fragments cemented together.

Chert is primarily classified as a type of sedimentary rock formed from the accumulation of biogenic or chemical sediments.

Coal is formed from the remains of plants that lived and died millions of years ago in swampy environments. These remains were subjected to pressure and heat over time, resulting in the formation of coal, which is classified as a sedimentary rock.

Dolomite is a sedimentary rock formed from the mineral dolomite, which is composed of calcium magnesium carbonate. It is usually found in sedimentary basins and is commonly associated with limestone.

Flint is a type of sedimentary rock formed from the compaction of silica-rich organisms.

Iron Ore is typically classified as a Sedimentary Rock due to its formation process involving the deposition and solidification of sediments, such as oxygen and iron, over millions of years.

Limestone is formed mostly of the mineral calcite and can be found in sedimentary layers in areas that were once covered by ancient seas.

Andesite is an igneous rock formed from the cooling and solidification of magma.

Basalt is an igneous rock that forms from the cooling of lava at or near the surface of the Earth. Although basalt is extrusive in nature, it falls under the category of igneous rocks.

Basaltic rock is typically transformed into amphibolite metamorphic rock due to the high temperatures and pressures in the Earth's crust.

Conglomerate Sedimentary Rock is formed from the consolidation of gravel, sand, silt, or clay, making it distinct from the other types of rocks mentioned in the incorrect answers.