During the early Paleozoic, two cratonic sequences were deposited in North America, the _______ and the ________ sequences.
Blog
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?
The Mesozoic Era is called the “Age of Reptiles” because ___…
The Mesozoic Era is called the “Age of Reptiles” because ____.
During the Mesozoic, North America was moving ____.
During the Mesozoic, North America was moving ____.
The Mesozoic Era was geologically busy. Which event did not…
The Mesozoic Era was geologically busy. Which event did not occur during the Mesozoic?