How many different species of dinosaurs are represented in the Colville river fossils?

In which situations is the principle of cross-cutting relationship useful in determining relative age?

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils

Study this image which statement best describes the rock shown check all that apply