Stratigraphers study the arrangements of sedimentary and rock layers by examining their fossil and mineral content.
(Stratigraphers; study; the arrangements of sedimentary and rock layers) Context(Stratigraphers study,List([0, 20))):(Stratigraphers; study the arrangements of sedimentary and rock layers by examining; their fossil and mineral content)
Stratigraphers study,List([0, 20))
Stratigraphers Stratigraphers
study study the arrangements of sedimentary and rock layers by examining
the arrangements of sedimentary and rock layers
their fossil and mineral content