destinystanley5621 destinystanley5621
  • 14-07-2022
  • Geography
contestada

Upon what basis were the upper and lower boundaries of the mesozoic era defined?.

Respuesta :

mackenziebuhl
mackenziebuhl mackenziebuhl
  • 14-07-2022

Answer:

Abrupt changes in the types of fossils, representing mass extinctions.

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