BIOL 2903 Lecture Notes - Lecture 1: Igneous Rock, Metamorphic Rock, Soil Chemistry
26 Jan 2018
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The total number of species of flora and fauna= biodiveristy. Great range of abiotic factors: range of environmental conditions such as: temperature, Precipitation, wind (colder, dryer, fierier), soil type, fire, rocks. Rocks are made of minerals that affect the nutrient supply and soil chemistry. The rock under any given region is called bedrock. These rocks are formed from sediments and are called sedimentary rocks. This rock is rich in calcium (calcium carbonate) and is relatively soft and basic in ph. Some limestone is made from animals whose fossils remains are full of calcium. Poison ivy loves basic soil and calcium. Other rocks were formed from molten rock (magma) deep underground. Igneous rocks usually lack calcium, have lots of silica and are hard and acidic. O(cid:373)e ig(cid:374)eous rocks (cid:449)ere for(cid:373)ed o(cid:374) top of the earth"s surface. A third type of rock is formed from pre-existing rock transformed by heat and pressure. Metamorphic rock retains the chemical characteristics of their parent rock.
