Science Quiz / 'S' in Geology Part 2

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Can you name the answers to these Geology questions where all of the answers begin with 'S'?

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An exstrusive, usually basaltic igneous rock containing many vesicles from trapped gases
A large landmass formed from the convergence of multiple continents
A force acting upon or within a mass or rock, expressed in terms of unit weight per surface area
A fault with horizontal displacement (e.g., the San Andreas Fault)
A feldspathoid mineral that ranges in color from white to blue to violet blue (#4 above)
Depression in the land surface formed by collapse or settling due to underground solution weathering
A large igneous province from an enormous eruption 251 million years ago; likely caused a mass extinction
Sediment transport by wind/water currents strong enough to keep the particles continuously above the bed/ground
A very hard isometric Mg-Al oxide gemstone of many colors; often masquerades as ruby or sapphire (#1 above)
Thinly bedded clastic sedimentary rock that is made up of clay-size (less then 1/256 mm in diameter)
Scratches/grooves on a rock surface caused by abrasive action of objects being transported over it (#3 above)
The study of sedimentary rock units, including their extent, age, classification, characteristics, and formation
A broad, gently sloping volcano that has been built up by many successive flows of low viscosity lava
A submerged mountain with at least 1000 m of local relief from the seafloor
Iron-aluminum nesosilicate common in intermediate to high grade metamorphic rocks (#2 above)
Clastic sedimentary rock composed of particles between 1/256 and 1/16 mm in diamter
Area at a convergent plate boundary where an oceanic plate is forced down into the mantle beneath another plate
The study of the distribution and probability of earthquakes over time
Color of a mineral in powder form, often determined by scraping a specimen across a surface of unglazed porcelain
The 1980 eruption of this U.S. volcano included a lateral blast to the north and deadly mudslides

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