1.(Minerals) a white mineral often tinted by impurities, found in sedimentary rocks and veins. It is used in the manufacture of cement and as a building stone (marble). Composition: calcium magnesium carbonate. Formula: CaMg(CO3)2. Crystal structure: hexagonal (rhombohedral) ...
a. packed earth, gravel, cinders, etc, used to make a racetrack b. (as modifier): a dirt track. 4. (Mining & Quarrying) mining the gravel or soil from which minerals are extracted 5. a person or thing regarded as worthless 6. obscene or indecent speech or writing 7. slang gossip...
Organic sedimentary rocks are one of three kinds of sedimentary rocks; the other two types are clastic and chemical. While clastic sedimentary rocks are made of sediment types of varying size and composition, chemical sedimentary rocks are made of minerals that precipitate from solution. Organic sedi...
Why do the crystals in gneiss line up in bands? Why don't sediments accumulate everywhere? Why are minerals important to the rock cycle? Why are terrestrial planets made of rock? Why are sedimentary rocks called secondary rocks? Why does water frozen in the cracks of a rock help to break...
Rocks: Galleries of igneous, sedimentary and metamorphic rock photos with descriptions. Minerals: Information about ore minerals, gem materials and rock-forming minerals. Volcanoes: Articles about volcanoes, volcanic hazards and eruptions past and present. Gemstones: Colorful images and articles about diam...
Find out how to group and classify rocks withrock lab! Raising Lifelong Learnershas a brilliant sediment jar. Read about rocks – we like theUltimate Guide to Rocks and Minerals Dig for rocks with thisgreat rock kitfrom National Geographic. ...
What do geologists use to study different minerals that make up a rocks composition? To study the minerals in such a rock, the mineralogist uses a petrographic microscope constructed for viewing thin sections of the rock, which are ground uniformly to a thickness of about 0.03 millimetre, in li...
There are three types of rocks, named for the manner of their formation. First, we have igneous rocks that form out of cooling magma. Second, we have sedimentary rocks that form when rock particles or even dissolved minerals are deposited and build up a later that turns to stone. Third, ...
If used regularly, these minerals build up in the soil and cause the plant to become sickly, turn black, and die. Instead, use distilled water or rainwater when watering your plant. 2. Insufficient Light Venus fly traps are light lovers and require a minimum of six hours for optimum growth...
Stonehenge, a bunch of 5000-year-old rocks, attracts a million visitors per year while fifteen million flock to see the pyramids. Whether it is glass, clay, stone, animal remains, wood or metal, we are filled with joy to find it, and the older it is, the better. A recent scientific...