Science Quiz / Mountain Building

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Can you name the Mountain Building

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

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