Rock Test 2

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 XPL 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

PPL XPL

Rock 7

PPL XPL

Rock 8

PPL XPL

Rock 9

PPL XPL

Rock 10

air bubble

PPL XPL

Rock 11