Cambrian, Ordovician, Silurian, Devonian
The best, cute little arthropod that was very diverse and abundant in the Cambrian and Ordovician.
What were trilobites?
Lasted from 299 to 251 million years ago.
What was the Permian Period?
The Taconic Orogeny.
What was the first Appalachian orogeny (in the Ordovician)?
Fossilized tracks, trails, burrows, nests, and dung.
What are trace fossils?
The sedimentary rock that is deposited in a river environment.
What is conglomerate?
A type of coastal margin with no earthquakes or volcanoes.
What is a passive continental margin?
The first Rocky Mountains Orogeny, in the Mississippian Period.
What was the Antler Orogeny?
The first transgression of the Paleozoic Era.
What was the Sauk?
The 36 major types of animal life.
What are Phyla?
The sedimentary environment that produces breccia.
What is an alluvial fan?
A better name than Cambrian "Explosion."
What is a "radiation?"
The first reptiles evolved in this Period.
What was the Pennsylvanian Period?
The third Appalachian orogeny in the Carboniferous and Permian Period, which helped to form Pangaea.
What was the Alleghenian Orogeny?
Animals with a notochord at some point in their development.
What are chordates?
Beaches and deserts.
What are two environments that make sandstone?
The Paleozoic Period in which trilobites enjoyed the highest diversity of species.
What was the Ordovician?
Most of the world's coal formed in this time.
What was the Carboniferous (Mississippian and Pennsylvanian)?
The volcanism that ended the Paleozoic Era was so much worse because it erupted through layers of evaporites and this carbon-rich former plant material.
What is coal?
The first land animals, also known as "sea scorpions."
What were eurypterids?
Rounding and sorting.
What are the two things that happen to clastic sedimentary particles?
Aegirocassis and Anomalacaris were large members of this type of arthropods.
What were radiodonts?
Lowland basins that form next to mountain ranges where coal swamps form.
What are foreland basins?
The name of the volcanism that caused the Permian extinction.
What was the Siberian Traps?
Mammal-like reptiles with 1 temporal fenestrae, 3 ear bones, and differentiated teeth.
What are synapsid reptiles?
Thin annual sediment layers deposited in icy lakes.
What are varves?