Rock (geology) arkoses (12%). Sedimentary rocks often contain fossils. Sedimentary rocks form under the influence of gravity and typically are deposited in horizontal or near horizontal layers or strata and may be referred to as stratified rocks. A small fraction of sedimentary rocks deposited on steep slopes will show cross bedding where one layer stops abruptly along an interface where another layer eroded the first as it was laid atop the first. Metamorphic rocks are formed by subjecting any rock type—sedimentary rock, igneous rock or another older metamorphic rock—to different temperature and pressure conditions than those in which the original rock was
Heat rock in different areas of the tank to create a more even heat gradient, making the pet more liable to move throughout its enclosure. Another popular solution is replacing regular lighting with UV-specific basking lights. http://www.anapsid.org/hotrock.html Heat rock A heat rock is the common name for a type of heating source in enclosures for cold-blooded animals to supply heat, in the form of a false novelty rock plugged into an electrical socket. Keepers may notice that smaller reptiles prefer to rest on the heat rock most of the time, since it provides constant heat. Larger reptiles supplied with heat rocks often