i need a brief geological history of region where gabbro, schist and sandstone are formed and found
These three rocks are examples of igneus, metamorphic, and sedimentary rocks. Check these sites for more information.
http://en.wikipedia.org/wiki/Gabbro
http://en.wikipedia.org/wiki/Schist
http://en.wikipedia.org/wiki/Sandstone
To get a brief geological history of the region where gabbro, schist, and sandstone are formed and found, you can start by researching the geological events and processes that lead to the formation of these rocks.
1. Gabbro: Gabbro is an igneous rock that typically forms as inclusions within other igneous rocks, such as basalt. It is formed through the slow cooling and solidification of magma beneath the Earth's surface. Gabbro is commonly found in areas where there has been volcanic activity or in oceanic crust.
To learn more about the geological history of gabbro formation, you can visit the Wikipedia page on gabbro: http://en.wikipedia.org/wiki/Gabbro
2. Schist: Schist is a metamorphic rock that forms from pre-existing rocks, such as shale or mudstone, through intense heat and pressure. It typically has a layered or foliated structure due to the alignment of minerals. Schist is commonly found in regions that have undergone significant tectonic activity, such as mountain building or collision zones.
To understand the geological history behind the formation of schist, you can visit the Wikipedia page on schist: http://en.wikipedia.org/wiki/Schist
3. Sandstone: Sandstone is a sedimentary rock composed mainly of sand-sized mineral particles and rock fragments. It forms through the compaction and cementation of sand grains, which often accumulate in environments such as rivers, beaches, or deserts. Sandstone is commonly found in areas with a history of deposition and erosion, where ancient riverbeds or coastal areas have been preserved.
To explore the geological history of sandstone formation, you can visit the Wikipedia page on sandstone: http://en.wikipedia.org/wiki/Sandstone
By researching the specific geological processes behind the formation of gabbro, schist, and sandstone, and the environments where they are commonly found, you can gain a better understanding of the geological history of the region you are interested in.