GY111L Geological Map Exercise Key

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Presentation transcript:

GY111L Geological Map Exercise Key Geological Attitudes & 3D Block Diagram Interpretation

Problem 1: Strike and dip of bedding: determine orientation from symbol. (B) (C) 25 55 270 90 270 90 270 90 71 180 180 180 (A) 030, 55W (B) 300, 25E (C) 060, 71SE (D) (E) (F) 270 90 270 90 270 83 90 85 180 180 180 (D) 270, 85S (E) Horz. (dip=0) (F) 330, 83W (G) (H) (I) 75 270 90 270 90 270 90 10 180 180 180 (G) 000, 90 (H) 300, 10SW OT (I) 300, 75NE

Problem 2: Strike & Dip of Bedding: determine symbol from orientation. (B) (C) 270 55 90 270 90 270 90 55 05 180 180 180 (A) 000, 44E (B) 060, 55SE (C) 300, 05SW (D) (E) (F) 65 270 90 270 90 270 90 180 180 180 (D) 030, 77NW (E) 330,65NE (F) 330, 90 (G) (H) (I) 270 77 90 270 90 270 90 37 180 180 180 (G) 000, 77W (H) 270, 37S OT (I) Horizontal (dip=0)

Problem 3: Trend & Plunge of Lineation. (B) (C) 15 25 270 90 270 90 270 90 55 180 180 180 (A) _240, 55_ (B) _330, 15_ (C) _060, 25_ (D) (E) (F) 270 90 270 90 270 90 40 180 180 180 (D) _150, 40_ (E) _060, 90_ (F)_Vert._ (G) (H) (I) 22 270 90 270 90 270 90 55 43 180 180 180 (G) _210, 43_ (H) _330, 22_ (I) _120, 55_

Problem 4: Inclined bedding: add strike & dip symbols and finish the side face of the block diagram. N 35 35 35 Df Sv Os Os Sv 35 Os Sv Df Ms

The sides of the block diagram. Problem 5: Folded strata: add strike and dip symbols, fold symbols, and complete The sides of the block diagram. N Kd Jo Kd Ta Kd Jo Trp Pa Trp Jo Kd Jo Pa Jo Jo Kd Trp Trp Pa Trp ? Pa

Symbols, and complete the sides of the diagrams. Problem 6: Folded strata with stream valley: add strike and dip symbols, fold Symbols, and complete the sides of the diagrams. N Ox Do Sa Ox Sa Do Mg Do Sa Ox Do Do Sa Ox Sa Ox Sa ?

Faces of the block diagram. Problem 7: Domes/Basins: add strike and dip symbols and complete the side Faces of the block diagram. -Co -Co Sa Os Di N Mr Sa Os Di -Co Sa Os p-C -Co Os -Co p-C p-C

the side faces, and add fold symbols along the axial traces. Problem 8: Plunging folds: add strike & dip symbols to map face, complete the side faces, and add fold symbols along the axial traces. Q Kpl N Kpl Jo Kpl Trg Ta Jo Po Jo Jo Kpl Po Trg Jo Trg Trg ? Po

Problem 9: Plunging and overturned folds: add strike and dip symbols, Complete the side faces, and add any fold axial trace symbols. Trx Jo Jo Kpk Ta N Jo Kpk Qa Kpk Jo Ta Kpk Qa Ta Qa Ta Kpk Qa Jo Ta

Reverse dip-slip -Ca -Cp H F N Ox -Ca -Ca -Cp U D Sj -Cp Ox Do Sj Ox Problem 10 Dip-Slip Fault: add strike & dip symbols, finish side faces, and add any needed fault symbols or labels. Fill in the classification below. Reverse dip-slip Fault Classification:____________________________ NOTE: slickensides in fault zone were oriented parallel to dip line of fault. -Ca -Cp H F 35 N Ox -Ca 35 35 -Ca -Cp U D Sj 35 70 -Cp Ox 35 35 Do Sj 70 Ox Do -Cp Sj

Side faces, and add any needed fold/fault symbols or labels. Problem 11 Faulting & Folding combined: add strike & dip symbols, finish the Side faces, and add any needed fold/fault symbols or labels. Fault Classification:______________________________________ Oblique: Normal dip-slip and rt.-lat. Strike-slip Pa Sr 40 55 45 D Sr Dg Osp U N Pa 75 60 Mw Osp 40 -Ca HW Mw FW 60 55 p-C 60 Dg Dg -Ca -Ca Sr p-C Sr Osp