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Describe how the fossils og TC were peserved?
They were under ocean water.
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Describe the Various types of fossils and the method of their persration?
- 1. Petrifide wood
- 2.hard shells
- 3.bones, teeths( hard parts)
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what are trace fossils?
Tracks, syphanes
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what are coprolites?
scapes
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what is a mold?
impression outside
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what is a cast?
impression inside
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Describe the habitat where the Nature Center now stands during the Eocene epoch?
Sedimentary rocks exposed today in the wall of TC include both Shale and sandstone deposited in the sea (scripps fromation) and mudstone deposited in rivers (friars formation)
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How can you tell that the ocean water was warm and the envior was tropical?
Climate was tropical, 60 inches of rain per year. especially in summer (10 inches)
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Describe the habitat where the NC now stands during the Pliocene epoch.
Marine sandstone formed during Pliocene is exposed in slopes near the mouth of TC
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Decribe how the retreat and advance of glaciers resulted in the formation of SD, Clariremont, kearny and Mira Mesas.
Sea level rose and fell many times. made changes in terrian, resvited w/ farling& an overall rising of Coastline& coved than elevated stair-step series.
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When was the mesa above TC shoreline?
250-300ft above sealevels cut by the surf about 700,000 to 800,000 yrs old.
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The Pleistocene shells on desplay are 300,000 years old. what evidence led to sign saying that the area at the time was tidal flat of an estuary?
- bc the fossils shells were discovered in 1992 during excavation for pipeline along morena blvd.
- Resemble fossils discoverd 1920s & 50s @ mont. TC
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what did Mission Bay look like during the beginning of the of the Epoch?
it was dry bc there was no water.
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what fault runs parallel to TC
Rose canyon fault zone
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Of what larger fault system is this a part?
San Andreas Fault
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what do the faults have to do with the fossils in this area?
- Its exposes the fossils
- made fossils visable
- movement of fault that moved sea level adn changed of land
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what has been one consequence of lager predators being displaced from metropolitan canyons suchs as TC?
fox& skunks have increase (smaller animals
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why is their more moisture in TC today than 200 hundered years ago?
- irrigation of surrounding yrs of golf course there is more water in canyon.
- hard scape (sement)
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what are the three primary community in the chaparral biome covering TC?
- (Chapparral) (sage)
- Top, north and south facing slopes
- Raparrian (stream)
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how many fault lines cross the mouth of TC?
4 fault lines
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Describe the Rose Canyon Fault line you saw at TC
- 1.consist of serveral parallel strands (tmakers organe line
- 2. mny short branch faults cross zone tiagonally (thinner organge lines)
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