Shale is a fine-grained sedimentary rock that forms from the compaction of silt and clay-size mineral particles that we commonly call mud.This composition places shale in a category of sedimentary rocks known as mudstones.hale is a rock composed mainly of clay-size mineral grains. These tiny grains are usually clay minerals such as illite, kaolinite and smectite. Shale usually contain other clay-size mineral particles such as quartz, chert and feldspar.
Extremely draught resistant Opuntia cactuses form arid shrub forests in the lowlands, particularly on the larger islands, like Santa Cruz. At higher elevations, the climate of the Galapagos Islands, Ecuador, is cooler and with more rainfall. As a result there is true forest on the higher mountains thanks to the cooling of the air as it is forced up. When the air cools off, the humidity in the air condenses, thus forming clouds.
One thousand kilometers (six hundred miles) west off the coast of Ecuador, isolated in the Pacific Ocean, lie the Galapagos GalÃ¡pagos. Islands the islands have been formed in The pacific by the interaction Of Plate tectonics And Hot Spot. volcanism few of the islands lie above or on the equator; however, most are found in the southern hemisphere. A single volcano formed each Island except for Isabela, which resulted from the union of six different volcanoes. The Galapagos GalÃ¡pagos islands lie on a platform of land that is higher than the surrounding ocean. seabed