rocks
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| Which rock is only formed by regional metamorphism? | Slate
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| Wavy bands of light and dark minerals visible in gneiss bedrock probably formed from the | heat and pressure during metamorphism
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| Which sedimentary rock is most likely to be changed to slate during regional metamorphism? | Shale
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| The rock shown below has foliated texture and contains the minerals amphibole, quartz and feldspar arranged in coarse-grained bands | gneiss
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| Which physical characteristic best describes the rock phyllite? | Foliated texture with microscopic mica crystals
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| Which rock is foliated shows mineral alignment but not banding and contains medium-sized grains of quartz and pyroxene? | Schist
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| Which sequence of change in rock type occurs as shale is subjected to increasing heat and pressure? | shale-slate-phyllite-schist-gneiss
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| Which type of rock most likely formed in zone A? | marble
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| What kind of rocks does the complaining rock collector want? | regionally metamorphosed rocks
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| Particles of sediment collected from a lake bottom average 1.2 centimeters in diameter. If left on the lake bottom to become buried by more sediment and compressed into rock, these particles would form | conglomerate
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| Which land-derived sedimentary rock could have formed by the compaction and cementation of particles smaller than 0.0003 centimeters in diamteter? | shale
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| Which type of rock is represented by the map symbol below? | chemically formed sedimentary rock that consists mainly of the mineral calcite
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| Which characteristic determines whether a rock is classified as shale, a siltstone, a snastone or a conglomerate? | the particle size of the sediments within the rock
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| Which sequence of events occurs in the formation of a sedimentary rock? | Source material eroded- sediments deposited-sediments compacted and cemented
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| What do each of these areas of mineral deposits have in common? | They were once covered by evaporating seas
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| Limestone, gypsum and salt are rocks formed by the processes of | evaporation and precipitation
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| Which process could lead directly to the formation of pumice rock? | explosive eruption of lava from a volcano
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| Which process is necessary for the formation of igneous rocks? | solidification
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| Which characteristics provides the best evidence that obsidian rock formed in an extrusive environment | noncrystalline glassy texture
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| Igneous rocks | from cooling and solidfication of lava or magma
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| Intrusive rocks | magma cools slowly, large crystals form
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| Extrusive rocks | lava cools quickly, small or no crystals form, may be vesicular and contains air bubbles
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| Sedimentary rocks | Generally form from the compaction and cementation of sediments
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| Clastic rocks | compacted sediment, classified by size
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| Organic crystalline | evaporates, precipitates and biological matter
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| Metamorphic rock | rocks are changed as a result of exposure to intense heat or pressure
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| Contact metamorphism | heat
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| Regional metamorphism | pressure
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| Rocks are classified into three different groups depending on | how they form ( origin )
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| Magma | lava that stays underground / melted rock underground
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| lava | lava that shoots out from the volcano
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| Intrusive igneous rocks | form from magma that cools down slowly under the ground. The slower the magma cools down the larger the intergrown crystals become
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| Extrusive rocks | Rocks that form when lava exits the earth and cools very quickly at the surface
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| Sedimentary rocks form from the | compaction and cementation of particles of rocks and sediments
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| Clastic sed. Rocks | from when particles are compacted and cemented togther
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| Clastic rocks are grouped / classified according to | size of the sediment particles in the rock
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| Chemical Sed. Rocks | Form when water evaporates and leaves mineral crystals behind or when crystals form in water
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| Bioclastic Sed. Rocks | Form from orgaince matter and or contains remnants of living things
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| Metamorphic rocks | form from the re-crystallization of unmelted rock material under intense heat and or pressure
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| Regional Meta. Rocks | Large regions under intense heat and or pressure become metamorphic
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| Contact Meta Rocks | forms at the interface between magma and surrounding rock underground
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