Term
| Location, Age, and notes of the orogeny TACONIC? |
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Definition
Laurentia
470 Ma
island art added to eastern edge of Laurentia |
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Term
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Definition
Baltica (hits Laurentia)
410 Ma
formation of Euroamerica |
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Term
|
Definition
Laurentia
370 Ma
Avaolonia added to northeastern edge of Laurentia by movement of Baltica |
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Term
|
Definition
Laurentia
350 Ma
island arc added to western edge of Laurentia |
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Term
|
Definition
Laurentia
300 Ma
Avalonia added to eastern edge of Laurentia by movement of Gondwana (Africa) |
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Term
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Definition
Baltica
300 Ma
collision of Baltica and Gondwana (Africa) |
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Term
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Definition
Laurentia
250 Ma
island arc added to western edge of Laurentia. End of Permian. |
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Term
| Definition of Cratonic sequence |
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Definition
| large scale lithostratigraphic units bounded by unconformities |
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Term
| Causes of cratonic sequences |
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Definition
| faster seafloor spreading and glaciation |
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Term
| What is the base of cratonic seqences made of? |
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Definition
| quartz or large sandstones |
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Term
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Definition
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Term
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Definition
| lets us interpret about environment based on size of particles |
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Term
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Definition
| middle of 3 continents packed together |
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Term
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Definition
| = "proto-Atlantic" (because of it's position). Iapetus gone when Baltica hits Laurentia. |
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Term
| How is the early Paleozoic climate different from today? |
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Definition
1. shorter days
2. tidal effects are greater
3. different ocean circulation patterns |
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Term
| evidence for warmth and coolness in the early Paleozoic? |
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Definition
warmth = fossils
coolness = glaciation |
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Term
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Definition
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Term
| Possible causes for the end of the extinction events at the end of the Permian |
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Definition
Pangea - reduces shores, blocked oceans, circulation, flood basalts
Extraterrestrial - chemical evidence of impaction |
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Term
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Definition
| extraordinary fossil deposits |
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Term
| Location of Chengjiang and Burgess Shale Fanuas |
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Definition
Chengjiang - China
Burgess - Canada |
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Term
| What organisms are useful as index fossils for the various parts of the Phanerozoic and when? |
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Definition
Conodonta - Paleozoic
Foraminifera - late Paleozoic-today
Radiolaria - Mesozoic |
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Term
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Definition
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Term
| Medusa and polyp body forms |
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Definition
body forms for cnidaria (corals, jellyfish)...
Medusa - mobile
Polyp - sessile |
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Term
|
Definition
| horizontal divisons in Tabulata (a Cnidaria; Anthozoa) |
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Term
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Definition
Porifera (sponges) identified by shape/arrangement of spicules.
Characteristics:
-spongin
-calcareous
-siliceous |
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Term
|
Definition
= symbolic algae
-removes waste
-mutual supply of nutrients |
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Term
|
Definition
- common name = sponges
- Cells not organized into tissues
- Add spongocoel
- Fossils identified by shape/ arrangement of spicules(mostly siliceous)
- Precambrian to recent
- Shallow marine (and few freshwater)
- Epifaunal, sessile, filter feed on
- Stromatoporoids – early Paleozoic reef builders |
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Term
| Archaeocyathida (extinct) |
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Definition
- Similar to Porifera and Cnidaria
- Here considered a distinct phylum
- Calcareous skeleton (no spicules)
- Cambrian
- Shallow marine
- Epifaunal, sessile
- Common reef-builder |
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Term
|
Definition
- common name: corals, jellyfish
- Cells organized into tissues
- Cnidocytes –stinging cells
- Body forms
-Medusa – mobile
-Polyp - sessile |
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Term
|
Definition
| flood basalts covering much of India |
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Term
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Definition
| downward displaced block bounded by normal faults |
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Term
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Definition
| uplifted block bounded by normal faults |
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Term
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Definition
| Permian and Triassic deposits in southern Africa |
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Term
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Definition
| fluvial sandstone in western US |
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Term
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Definition
| aeolian sandstone in western US |
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Term
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Definition
| shallow marine sandstone in western US |
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Term
| List and describe the 3 Cordilleran orogenies |
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Definition
Nevadan - continued subduction; numerous batholiths
Sevier - extensive faults
Laramide - created structures of Rocky Mts. |
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Term
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Definition
| stalked echinoderm, extinct |
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Term
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Definition
| stalked echinoderm, living |
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Term
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Definition
| mobile echinoderm, living |
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Term
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Definition
| anthozoan with tabulae and septae |
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Term
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Definition
| anthozoan with septae, no tabulae |
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Term
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Definition
| anthozoan with tabulae, no septae |
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Term
| give 1 possible explanation for why the Cretaceous was so warm |
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Definition
| gases from volcanoes and other greenhouse gases that were released warmed the air. |
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Term
| 3 groups of organisms that are useful as index fossils and give the era in which each of the 3 is useful |
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Definition
Conodanta - Paleozoic
Radiolaria - Mesozoic
Formaminifera - Cenozoic |
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Term
| How did the App. Mountains form? |
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Definition
| Taconic, Acadian, Alleghenian, erosion during Pangea, normal faults, modern erosion |
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Term
| location of Cimmerian plate, how it moves, and the timing of the Cimmerian orogeny. Be able to place this in the context of closing the Tethys Sea |
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Definition
-Oceanic plate under Tethys Sea
-Moves west in the Mesozoic
-Thick marine sediments overlain by coastal deposits |
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Term
| What is the cause of the Zuni cratonic sequence? |
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Definition
| Result of quicker and more extensive tectonic activity |
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Term
|
Definition
o Triassic – North-south split into Laurasia and Gondwana.
o Jurassic – India splits from Africa; Antarctica-Australia splits from Africa.
o Cretaceous – South America splits from Africa.
o Cenozoic – Laurasia splits into North America, Greenland, and Europe. Antarctica splits from South America and Australia. |
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Term
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Definition
subduction - 1 plate forced under another
obduction - forcing 1 plate up, over another plate |
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Term
|
Definition
Cells in tissues
Cnidocytes - stinging cells
Medusa (mobile)
Polyp (sessile)
Corals, Jelly Fish (sea fan) |
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