Pages - - words. Looking for Expert Opinion? Quartz Which major component of detrital sedimentary rocks only rarely occurs as a primary mineral in igneous rocks? CaMg CO3 2 Zircon and tourmaline are dense, highly insoluble, chemically stable, minor minerals of igneous and metamorphic rocks. Iron oxide What is probably the single most important, original, depositional feature in sedimentary rocks? Potassium, magnesium, and bromine Which of the following describes the correct order for relative solubility of minerals in sedimentary rocks?
Travertine Which one of the following is not a chemical sedimentary rock or evaporite? True Detrital sedimentary rocks have clastic textures. True Peat is thought to be the original material from which coals are formed.
True Graywacke sandstones are typically better sorted than sandstones lithified from ancient beach sands. False Clastic particles in a sedimentary breccia are rounded and are about the same size as fine-grained sand. False Many limestones are of biochemical origin.
True Boulder conglomerates suggest deposition by strong winds in a desert. False Mud cracks in a shale or mudstone indicate that the mud or clay was deposited in deep waters of an offshore marine environment.
False Chalk, coquina, and ancient coral reefs are primarily composed of microcrystalline quartz. False Water is gradually expelled from compacting clay and mud sediments. True The mineral dolomite, which is the major mineral of the sedimentary rock dolostone, is a carbonate of calcium and magnesium. True tThe chemical sedimentary rock, conglomerate, is composed of gravel-size, rounded, calcite oolites.
False Detrital sedimentary rocks are classified according to clastic particle size; chemical sedimentary rocks are named according to the most abundant minerals. True A feldspar-rich sandstone is called an arkose. Like the Tone? You can get your paper edited to read like this. Work with our consultant to learn what to alter. Read more. NASM Flashcards Which of the following is the process of getting oxygen from the environment to the tissues of the body?
Unfinished tasks keep piling up? Church, Mario Coniglio, Lawrence A. Hardie, Frederick J. Contents Search. Feldspars in sedimentary rocks. Authors Authors and affiliations Sadoon Morad. Reference work entry First Online: 28 February How to cite.
Feldspars in sedimentary rocks can be of detrital and diagenetic origins. Feldspars are a group of alumino-silicate minerals whose structures are composed of corner-sharing AlO 4 and SiO 4 tetrahedra linked in an infinite, three-dimensional array. Charge balancing, M cations with radius greater than 1. Detrital grains of some mineral s are extremely rare in detrital sediments. Which minerals and why? Match the detrital rock with the appropriate description: Using the pulldown boxes, match each item on the left to the corresponding item at right.
If shale is such a common rock in the sedimentary rock world, why isn't it as prominently exposed at the surface as sandstone? Shale crumbles easily, causing increased mechanical weathering, whereas sandstone resists weathering more effectively. Shale resists weathering more effectively, whereas sandstone crumbles easily, causing increased mechanical weathering. Shale has easily broken, highly reactive minerals, whereas sandstone has harder-to-break minerals.
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