exam maps

Exercise THREE:

Using the data below put the following rock units in order of age. Then write a paragraph describing the changes over time.

Figure 1: Rock cross section at the landing site of third Nasa Probe to the surface of Arda

C = granite, M = Gneiss , G = conglomerate, A = sandstone with marine fossils,

K = Limestone, D = shale, B = granite, N = sandstone with marine fossils, L = shale

T = basalt lava flow R = mudstone J = sandstone, Z and F = faultlines

Rock Type	Sediment types	Possible Features	Deposition Location
Sandstone	Medium grained sand	Marine fossils, poorly sorted	Beaches and offshore
Siltstone	Fine grained silt and mud		Delta, offshore marine
Shale	Very fine grained mud	Marine fossils	Far off shore, continental slope
Limestone	Plankton and shell remains	Fossils	Seafloor,
Sandstone	Medium grained sand	Land fossils, well sorted, cross bedding	Desert sand dunes
Siltstone or shale	Fine grained silt & mud	Land fossils, mud cracks	Slow stream bed or lake bed

Rock Type	Texture	Type of Lava	Formation location
Granite	Coarse grained, large crystals	Silica rich	Underground
Basalt	fine grained	silica poor	On the surface
Andesite	fine grained	intermediate silica	On the surface

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