Rivers and floodplains along the shores of the (*) Sundance Sea produced layers of reddish-grey siltstone and sandstone that make up its Morrison Formation.
This period saw the collision of the Smartville Terrane with the North American Plate as part of the Nevadan Orogeny that produced the Mother Lode of gold in present-day California as well as the oldest plutons of the batholith of the Sierra Nevada. The lobster-like Eryon (AIR-yon) is one of many well-preserved fossils in a lithographic limestone formation laid down during this period in salty lagoons that produced a complete feathered Archaeopteryx (AR-kay-OP-ter-icks) in the Solnhofen Limestone. Rivers and floodplains along the shores of the (*) Sundance Sea produced layers of reddish-grey siltstone and sandstone that make up its Morrison Formation. Alexander von Humboldt helped name this period for rocks in a French mountain range and it includes fossils of Stegosaurus and Allosaurus. For 10 points, identify this geologic period that comes after the Triassic and before the Cretaceous.
This period saw the collision of the Smartville Terrane with the North American Plate as part of the Nevadan Orogeny that produced the Mother Lode of gold in present-day California as well as the oldest plutons of the batholith of the Sierra Nevada.
Jurassic period