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Question
while looking for fossils on an eroded hillside, you discover fossil coral and fish in one layer. in a layer just above, you find the fossil imprint of a fern frond and some moss. assuming the rock has not been disturbed, which of the following is the most probable conclusion? a) in the geologic past, the area was once covered by a shallow sea. b) the area had experienced heavy floods in recent times. c) a saltwater sea had changed to a freshwater lake long ago. d) a forest had once grown there but had become submerged by water.
Los fósiles de coral y peces indican que el área fue un entorno marino, específicamente un mar poco profundo, ya que estos organismos viven en agua marina. El hallazgo de un fósil de fern en una capa superior sugiere un cambio posterior en el entorno, pero la presencia inicial de fósiles marinos apoya la idea de que el área fue cubierta por un mar poco profundo en el pasado geológico.
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A) En el pasado geológico, el área fue cubierta por un mar poco profundo.