Rock Test 1 Write down details on each rock as seen under PPL and XPL on the worksheets provided for you ; then identify the rock type (igneous/ sedimentary/metamorphic)

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Presentation transcript:

Rock Test 1 Write down details on each rock as seen under PPL and XPL on the worksheets provided for you ; then identify the rock type (igneous/ sedimentary/metamorphic) and name the rock. under PPL and XP grain type (crystalline or fragmental) grain size (coarse, medium, fine) grain shape (rounded, angular, variable) grain relationships (grains/crystals of similar size; large crystals in fine matrix; grains/crystals randomly distributed; crystals lined up in one direction) minerals present (identified by . . . & . . . % in rock) other features (fossils present, muddy matrix, glass) colour under PPL (mainly light or dark) colour under XPL (mainly grey/black or brightly coloured)

The ROCKS to choose from : (not given in this order) granite diorite gabbro dolerite basalt shelly limestone sandstone arkose greywacke marble schist

PPL XPL Rock 1

PPL XPL Rock 2

PPL XPL Rock 3

PPL XPL Rock 4

PPL XPL Rock 5

PPL XPL Rock 6 has been rotated 40o in XPL view

PPL XPL Rock 7

PPL XPL Rock 8

PPL XPL Rock 9

PPL XPL Rock 10

PPL XPL Rock 11