They are endeavoring to determine the environment of deposition for the Tapeats Sandstone, Grand Canyon, Arizona.
(They; are endeavoring; to determine the environment of deposition for the Tapeats Sandstone, Grand Canyon) Context(They are endeavoring,List([0, 20))):(They; are endeavoring to determine; the environment of deposition for the Tapeats Sandstone, Grand Canyon)
They are endeavoring,List([0, 20))
They They
are endeavoring are endeavoring to determine
to determine the environment of deposition for the Tapeats Sandstone, Grand Canyon
the environment of deposition for the Tapeats Sandstone, Grand Canyon