Sediment (pages 33-40)
What kind of water does sedimentary rock form in?
fast moving
All of the living and non-living things in an area
environment
What type of evidence shows that an environment has changed over time?
different rock layers
What happens to sediment after it is carried by water?
sinks through water.
What type of sedimentary rock is made mostly of silt?
siltstone
What kind of water does mudstone form un be form in?
clay
staying mostly the same
stable
what are the two process that create sedimentary rocks
compaction and cementation
What does the upper sediment do to the lower sediment?
compacts it
Name one type of rock that is made mostly of clay?
shale or mudstone
What type of sediment forms shale?
clay
a scientist who studies the solid parts of the Earth, like rocks and fossils
Geologist
Where are fossils usually found?
In sedimentary rock.
What happens after sediment is compacted?
it cements
conglomerate rock
What is one environment that siltstone forms in?
Flood plains or river deltas
rocks that is formed from sediment
sedimentary rock
What claim can be made about the layer of the rocky outcrop where mudstone, Mosasaurus, and Mortoniceras were found?
that this layer was created in the deep ocean
The lowest rock layer is the ______??
oldest
What 2 types of rocks are made in slow moving water?
mudstone and siltstone
What are the three different environments that mudstone forms in?
floodplains, lakes, or deep ocean.
a clue about life from the past that is preserved in rock
fossil
What claim can be made about the layer of the rocky outcrop where siltstone and Lepidodendron was found?
it was once a river delta or floodplain
What needs to be present in an environment for sedimentary rock to form?
water
What 2 types of rocks are made in fast moving water?
conglomerate and sandstone