which kind of rock is grainte?
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short answer:\nGranite is a common and widely-occurring type of intrusive, felsic, igneous rock. ...
786248
dairydahm is right!  It's conglomerate.  Sedimentary (so you were right, too) rocks can contain pebbles of similar or varying sizes, depending where it formed.  Below are some sites that have pics of conglomerates for you to check--if you don't believe us.  (I'm a geology teacher, by the way.  (-; )
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You could start here:\n\nhttp://webmineral.com/data/Magadiite.shtml
898264
Diatomaceous earths.\nPerlite and Vermiculite (expanded).
1012443
Igneous.  Not sedimentery because those are made up of worn down other rocks, and not metamorphic because they are rocks that were originially another sort of rock.
853307
It is most likely a schist due to the foliation, mineral alignment and the lack of banding, but pyroxene is most likely to occur in a gneiss so it is probably a high metamorphic grade schist
148793
rock refers to solid mineral deposits. Rocks are minerals, but not all minerals are rocks.\nSome minerals, given time and circumstance, form solid deposits. These solid mineral deposits are known as rock. Pressure, temperature, erosion, and friction are forces that effect the formation of rocks. The rock formation process allows geologists to classify rocks into three groups: sedimentary, igneous, and metamorphic. Sedimentary rock forms when layers of "sediment" (small particles of solid minerals like sand and pebbles) fuse together over time under the force of water or wind. Sedimentary rock is commonly found in and near riverbeds and streambeds. Igneous ("fire-formed") rock forms after minerals are heated to extremely high temperatures and then allowed to cool.
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Wow, what a question... This was the best I could come up with...\n\n"The characteristics of granitoid-related tungsten deposits hosted in siliceous (carbonate-free) rocks (e.g., Panasqueira, Cligga Head, Pasto Bueno) are reviewed and the ranges of physicochemical parameters of the ore-forming fluids are summarized. The two important tungsten minerals in these deposits are wolframite and scheelite, which were deposited mostly between 200° and 500°C and 200 and 1,500 bars. The salinities of the mineralizing fluids were typically less than 15 wt percent but commonly were significantly higher (up to 55 wt %). The two predominant dissolved components are Na+ and Cl– with subordinate Ca2+, K+, and carbonate species (/HCO3–). The contents of CO2 are highly variable, but XCO2 values typically range from 0 to 0.1. Limited pH and fO2 estimates indicate a moderately acidic fluid with oxygen fugacities between those of the QFM and HM buffers. These parameters were used to guide solubility and speciation modeling of W in hydrothermal fluids in granitoid environments."\n\nThanks for expanding my thinking!
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Cool. I hope you found some good ammonites. You may have been in the Cretaceous Western Interior Seaway, which once connected what we now call the Gulf of Mexico to what is now the Arctic Ocean. The Pierre Shale is full of clams, ammonites, and baculites. \n\nThe Western Interior Paleontological Society has some good publications:\nhttp://www.wipsppc.com/#\nHere is link to a Pierre Shale field trip of the WIPS in Colorado:\nhttp://www.paleocurrents.com/baculite_mesa/index.html\n\nHere is an awesome website put together by Dr. Ron Blakey at NAU. For your interests, the first place to start would be paleogeography of the Southwestern US, which has paleogeographic maps of each major period (that include southern Colorado):\nhttp://jan.ucc.nau.edu/rcb7/paleogeogwus.html\nThe top page of his site is at:\nhttp://jan.ucc.nau.edu/rcb7/\n\nYou might also want to buy a copy of "Roadside Geology of Colorado". This series of books is written by geologists who are familiar with the state they write about and describe the geologic features that can be found along the major highways. Here's the cite:\nChronic, H. 1980. Roadside geology of Colorado. Mountain Press Publ. Co., Missoula, Montana, 334 p.\n\nThe Colorado Geological Survey sells a map for $7 that is titled "Colorado Geologic Highway Map" that shows lots of geology information, as well as a lot of other high quality geology related publications:\nhttp://dnr.state.co.us/geostore/ProductInfo.aspx?productid=MI-38\n\nHere is the USGS page for Colorado:\nhttp://www.usgs.gov/state/state.asp?State=CO\n\n\nEnjoy.
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Both of the other anwers are right, but I thought you might also like to know why the granite is harder and can scratch the marble.\n\nThe granite is made of crystals of the minerals quartz (harndness 7), feldspar (hardness about 6) and relatively small amounts of mica (hardness 2 to 3).  This is what geologists call granite; there are a lot of other stones that stonecutters call granite, but almost all of them are made of minerals that are nearly as hard as or even harder than the stuff in geologists' granite.  A higher hardness number means a harder material.  Talc, at 1, is very soft and diamond, at 10, is very hard.\n\nMarble is made of all or mostly calcite, which has a hardness of 3.\n\nSo when you rub the granite and marble together, most of the contact is between harder mineral grains in the granite and softer mineral grains in the marble, and the granite scratches the marble.
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Metamorphic rocks are already existing rocks that change under heat, pressure or in chemical reactions (usually underground). Examples are Gneiss (that froms from Granite), Slate (formed from Shale), and Quartzite (formed from Sandstone).\n\nSedimentary rocks are rocks made from sediment (haha makes sense, no?) which can be both organic (fossils!) or inorganic. They are formed into a solid rock through a variety of different forces, including erosion, deposition, compaction, and cementation. There are 3 major groups of sedimentary rocks, which are clastic (formed from the compression of rock fragments), organic rocks (Key word: ORGANIC, aka the remains of plants and animals), and chemical rocks (formed when a solution dissolves, & minerals are left behind). Examples:\nClastic: Shale, Sandstone, Conglomerate, and Breecia\nOrganic: Coal, Limestone\nChemical: Halite, Gypsum\n\nIgneous rocks are formed from magma or lava. They are classifed according to where they were formed-- extrusive rocks are formed from lava on Earth's surface, while intrusive rocks are formed from hardened magma beneath Earth's surface. Texture and mineral composition are also factors of classification. Examples include granite (which is extremely abundant), Rhyolite, Pegmatite, Porphyry, Basalt, Pumice, and Obsidian.
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phyllite, basalt, slate, shale. There are many types of schist. It is defined mainly as being a plated metamorphic rock in which the mineral crystals can bee seen with the naked eye.
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I will answer first the easy one. The oldest rocks are found in the pacific plate, the ones near the marianes trench, but their age is not 4.6 bya. Because old rocks return inside the earth through subduction zones. \nRefer to rock cycle.\nNew rocks are produce at the MOR (mid-oceanic ridges) and old ones are consumed at the subduction zones.\nThere are no very old rocks in continental crusts because they were weathered and eroded and brought to seas through rivers.\nNow about fossils. Most fossils are found in sedimentary rocks. Sedimentary rocks forms when sediments accumulates and cemented. Like lakes, and seas. Usually these place occur life. For example a leaf fall from a tree and left at the bottom of the river. Sediments pile over the leaf and thus preserved.\nIf lava piled over a life (like a leaf) the life or existence will burn and thus not preserved.\nFor fossil to occur it must be preserved. Its very difficult to preserved something if heat is involved.
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None at all. A geode is just a not so ordinary rock. Although some not so ordinary rocks such as petrified wood, are protected in some places, I don't believe geodes are.
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A rock is a naturally occurring aggregate of minerals and/or mineraloids. Rocks are classified by mineral and chemical composition, by the texture of the constituent particles and by the processes that formed them. These indicators separate rocks into igneous, sedimentary and metamorphic. They may also be classified according to grain size, in the case of conglomerates and breccias or in the case of individual stones.\n\nMinerals are natural compounds formed through geological processes. The term "mineral" encompasses not only the material's chemical composition, but also the mineral's structure. Minerals range in composition from pure elements and simple salts to very complex silicates with thousands of known forms (organic compounds are excluded). The study of minerals is called mineralogy.
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Any class of rocks that are the result of partial or complete recrystallisation of pre-existing rocks such as sedimentary or igneous rocks... or other metamorphic rocks!\n\nfor low grade metamorphic rocks the prefix meta- is commonly used i.e. meta-basalt or meta-sandstone.\n\nNaming of metamorphic rocks is also reliant on the dominant minerals occuring in the rock i.e. Biotite Schist\n\nhere are some names of some common metamorphoc rocks\n\nHornfels\nSchist\nGneiss\nEclogite\nAmphibolite\nMylonite\nSerpentinite\nMarble\nGranulite\nAnorthosite\n\nhope this helps
860456
Rock can be either. For example, gold can be included in quartzite as discrete nuggets and therefore is heterogeneous but in shales and slates, lava, and even crystals, it is homogeneous. A heterogeneous material is a mixture of two or more things that are not bonded together and could be separated easily. A homogeneous substance is one where two or more elements are joined together in such a way that they are not easily separated. Think of this...sand and sugar...they are heterogeneous as we can dissolve the sugar and separate them easily, but with milk and coffee...they are homogeneous as it would be very difficult to divide the two.