Problem (5.6 You are mapping metamorphic rocks and you notice a lineation within

Question

Problem (5.6 You are mapping metamorphic rocks and you notice a lineation within the rocks. At five different outcrops you measure the pitch of the lineation on an exposed planar rock surface (not necessarily the same struc- tural surface at each outcrop). The table below lists the attitude of each exposed surface and the pitch of the lineation on that surface. Attitude of surface Outcrop no Pitch of lineation 300°, 84°NE 76 E 350°, 30°E 50°N 040°, 70 SE 63°Sw 337, 30°W 50°S 272°, 45°N 59°E You hypothesize that this lineation represents a planar fabric within the rock. Test this idea by de- termining whether these five lineation orientations are coplanar. If so, what is the attitude of the plane?

Explanation / Answer

Ii the given data of planarsurfaces and pitch of lineation from five different outcrops shows almost coplanar lineation attitude except no.-3 but the attitude of planes shows almost NW strike directions and highly dipping planes and the angle of lineation with the dip angle is inclined in all five cases.

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