If a layer was deposited but does not appear in the rock record what has occurred

Basically, scientists have learned that rocks are stacked in layers containing ... It's as if rock layersare a vertical timeline. ... We're not talking about an abstract diagram: this is the actual record of the earth's crust, recorded in rocks around the world. But how do we know this evolutionary sequence oflayers,

Ibelieve it is the 2nd answer, create gardens on all rooftops. let me know if this .

Your answer is d. silli hope this ! : ) i left an explanation down below if you need it: a sill forms when hot magma squeezes between layers of rock to form a hardened sheet of rock. a sill is basically a tabular sheet intrusion between old layers of sedimentary rock, volcanic beds, or in the direction of foliation inherent in metamorphic rock. the word sill means a concordant intrusive sheet.