Which is the first step that geologists must do to compare rock layers at distant locations? find the absolute age of rocks at both locations

compare a layer at one location to layers at other locations

identify index fossils in one or more layers at one location

collect fossils from different locations to study the organisms' lifestyles

Wetlands form where water and land meet. a lake with a wetland fringe can fill in with decayed plant and animal material to become a wet meadow. a pond can fill in to become a bog or fen. sediment can fill in a river marsh to become a swamp.flooding of coastal lowlands from rising sea levels has created broad coastal marshes that are protected from wave action by barrier islands or reefs. coastal wetlands also form when rivers deposit sediment as they reach the ocean. plants then take root and hold the soil firm against the forces of tides and waves.

Hmmm i'm not sure about this one