Sedimentary, metamorphic and igneous rocks are found in Georgia. The state has four distinct geographic regions, and different types of each rock can be found throughout the land.Know More
The northwest corner of Georgia falls into the Valley and Ridge region. Sedimentary rocks, such as limestone, sandstone and shale, are found here. Barite, ochre and coal have also been mined from this region.
The Blue Ridge region contains the mountains of North Georgia. These rocks are metamorphic, coming from pre-historic sedimentary and igneous rocks. Metagranite, gneiss, mafic, ultramafic and metavolcanic rocks are common in this area.
The middle geographic section of Georgia, the Piedmont, contains metamorphic rocks as well. It also has igneous rocks in some areas. The metamorphic rocks are slightly different from the metamorphics found in the Blue Ridge region. Rocks in this portion of the state include schist, gniess, amphibolites, migmaties, and the igneous granites. Granite is mined from this area, and the granite "Stone Mountain," a tourist attraction, was formed by the same granite veins that traverse the region.
The Coastal Plain region contains mainly sedimentary rocks, with metamorphic and igneous rocks underneath. Limestone, sandstone and shale are found here, and the beaches contain white quartz. Kaolin is mined in this region, as are limestone formations.Learn more about Geology
Mica is a silicate mineral that can be found in nature as metamorphic or igneous rocks. Mica can also be found in sedimentary rocks depending on the types of minerals left behind by water and what minerals are in the area.Full Answer >
The most common type of igneous rock, basalt, also known as malfic rock, can be found on oceanic plates at divergent plate boundaries. Intermediate and felsic igneous rocks show up along continental margins, as well. Because igneous rocks form from the cooling of lava and magma, they can be found around areas where volcanic activity is or has been present.Full Answer >
Metamorphic rocks are most often found in mountainous regions though they can be seen wherever there are signs of geological upheaval in an area. This type of rock is formed by the transformation of another rock type, a change that is usually triggered by tremendous heat, pressure or other violent phenomena. The forces that cause metamorphic rocks to form are so great that they change not only the appearance but also the chemical composition of an existing rock.Full Answer >
Metamorphic rocks can commonly be found in mountain ranges, like the Himalayas, Alps and Rocky Mountains. This is because metamorphic rocks form at the core of mountains from the intense pressure and heat. As mountains erode away over time, these types of rocks can be found on the surface.Full Answer >