A scientist at a canyon notices observes a dike cuts across the sedimentary layers. How did it get there?
A) It was there before the layers; the layers built upon above and beneath it over millions of years.
B) There was an earthquake a layer of igneous rock was thrust into the sedimentary layers..
C) Magma rose from within the earth and intruded the sedimentary layers.
D) A piece of a volcano broke off beneath the earth..
Question 2
In which ways does pressure influence different rock compositions' melting points?
A) the more pressure, the higher the melting point
B) the more pressure, the lower the melting point
C) pressure changes the composition of the rock, raising the melting point
D) pressure changes the composition of the rock, lowering the melting point
An example of layers, or strata, of sedimentary rock that contain fossils
Epidermal and Dermal Layers of the Skin
Layers and membranes of the heart.
Jupiter’s and Saturn’s Upper Layers
Rock layers (strata) usually look like layers in a cake such as these strata at Olduvai Gorge Tanzan
Layers of the heart