Sample A likely underwent the most abrasion during transport as it contains the most rounded and polished quartz grains. Geologists would conclude a slab of rock was formed in a tropical climate if it contains more clockwise spiral snail shells, as warm waters cause that direction of coiling. The oldest rock layer depicted is the shale layer in outcrop I, as stratigraphic correlation shows lower layers to be older.
The diagram shows four magnified blockshaped sandstone samples labeled.pdf
1. The diagram shows four magnified blockshaped sandstone samples labeled A, B, C, and D. Each
sandstone sample contains quartz grains of different shapes and sizes. The quartz grains are held
together by hematite cement. In which sample did the quartz grains undergo the most abrasion
during erosional transport? Snails have lived in most of the world's oceans over a period of
hundreds of millions of years. Paleontologists discovered that in warm. tropical waters more
snails have shells that, when viewed from the top, spiral outward in a clockwise direction. In
cool or cold waters, more snails have shells that spiral outward in a counterclockwise direction.
Both clockwise and counter clockwise spiraled snail fossils have been found in bedrock. In a slab
of rock that contains many fossil snails, what evidence would lead geologists to conclude that the
slab was formed in a tropical climate? more counter-clcokwise spiral snail shells the slab has
igneous rock in it more clock-wise spiral snail shells the slab has sedimentary rock in it The
cross sections bellow represent three outcrops, labeled I, II, and III, containing some New York
State index fossils. The rock layers have not been overturned. When the rock layers in the three
outcrops are correlated, which is the oldest layer? shale layer in outcrop I limestone layer in
outcrop III siltstone layer in outcrop II conglomerate layer in outcrop III
