Whose ability to use fossils in stratigraphy was identified as a major breakthrough in sequencing rock layers?
Carl Gilbert and Willard Libby
Georges Cuvier and William Smith
James Hutton and Nicholas Steno
Stephen Calvert and Charles Lyell

one characteristic that is shared by all is a soft body. many

of these invertebrate animals also have an outer shell to protect their

body. oysters, clams, snails, and mussels are all mollusks. so are octopuses, squids, and slugs. mollusks live on land and in freshwater.

c

explanation:

d. groundwater flows through the subsoil and deposits minerals.