The Sundance Sea transgression took place before the Cretaceous Interior Seaway formed.
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Most of Earth’s coal deposits formed due to widespread _____…
Most of Earth’s coal deposits formed due to widespread ___________ conditions.
What adaptation allowed reptiles to thrive in terrestrial en…
What adaptation allowed reptiles to thrive in terrestrial environments over their amphibian counterparts?
During the early Paleozoic, two cratonic sequences were depo…
During the early Paleozoic, two cratonic sequences were deposited in North America, the _______ and the ________ sequences.
Which of the following is not true about theraspids?
Which of the following is not true about theraspids?
A ___________ is a stratigraphic unit that captures a transg…
A ___________ is a stratigraphic unit that captures a transgressive-regressive cycle. On either end of the cycle, unconformities are present.
Amphibians evolved from lobe-finned fish, as their fins were…
Amphibians evolved from lobe-finned fish, as their fins were supported by muscles.
The three intervals, from oldest to youngest, of Precambrian…
The three intervals, from oldest to youngest, of Precambrian time are the ____.
Some of the oldest known fossils, large reef complexes built…
Some of the oldest known fossils, large reef complexes built by microorganisms, are called:
What process formed the early atmosphere?
What process formed the early atmosphere?