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Gypsum is formed underwater, usually between layers of shale and limestone. When the water evaporates and the area dries, the gypsum becomes solid "rock" gypsum.
Location. Different layers of rock/soil tell a roughly chronological tale of the past, barring cataclysm. There are enough undisturbed sites worldwide that a mosaic can be discerned. Good question.
every thing
it forms a sedimentary rock
Arteries actually have 5 layers, it is the veins that have 3. Arteries have: -the Outer coat -Elastic layer -Middle coat (thin) -Another elastic layer -Endothelium
Limestone is the youngest since it's at the top
Probably Kaibab limestone, Coconino sandstone, Hermit shale, Redwall limestone, Muav limestone, Vishnu Schist, and other layers.
Sedimentary rock, such as limestone, chalk, slate and sandstone.
sedimentary rock like sandstone or limestone
They are sedimentary rock. Four examples being chalk, sandstone, limestone and slate.
Probably Kaibab limestone, Coconino sandstone, Hermit shale, Redwall limestone, Muav limestone, Vishnu Schist, and other layers.
the way geologist know that rock layers are undisturbed is the rock layers are folded
The rock layers will be easily visible.
The undisturbed rock layers are horizontal and in order of age from youngest nearest the surface to oldest at the bottom of the rock unit.
The oldest layers of undisturbed sediment are at the bottom.
Stratification
The layers of any sedimentary rock are called strata.