Science Quiz / Mountain Building

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QUIZ: Can you name the Mountain Building

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vertical movements
an episode of intense mountain building
horizontal and vertical movements
deformed rocks return to their original shape when stress is relaxed
results from forces acting in opposite directions along the same line; lead to block-faulting
up-arched fold
accumulation of great thickness of sedimentary or volcanic rocks
marine environment
hanging wall moves up at a dip of less than 45 degrees Celsius
down-arched fold
forces act parallel to one another but in opposite directions; lead to displacement along closely spaced planes
continental interiors that have been structurally stable for a prolonged peropd of time
up-arched circular fold; rock layers dip inward toward a central point
deformation is accompanied by metamorphism and igneous activity
most geologists think they formed elsewhere and were carried great distances as parts of other plates until they collided with continents
horizontal movements
face of the fault or fault plane
permanent deformation of ductile rocks
rocks are squeezed or compressed by external forces directed toward one another; lead to folding and faulting
hanging wall moves down relative to the footwall
ggreater uplift along normal faults
any area of land that stands significantly higher, at least 300m, than the surrounding country and has a restricted summit area
a simple bend or flexure
related to convergence plate movements
block of rocks that differ completely in their fossil content, structural trends and paleomagnetic properties from the rocks of the surrounding mountain system
accumulation in an opening ocean basin
long period of uplift and erosion
fold axis is inclined; fold seems to plunge beneath adjacent rocks
addition of new material to continents
episode of intense deformation of the rocks in a region
change in shape and/or volume of rocks due to stress
Folds and faults
newly-thickened crust adjusts isostatically
a group of closely spaced mountains or parallel ridges; related in age and origin
permanent deformation of brittle rocks
hanging wall moves up relative to the footwall
down-arched circular fold; rock layers dip outward from a central point
chains of thousands of kilometers long composed of numerous mountain ranges

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