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Fossils in Rocks
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Published on Dec 22, 2015
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PRESENTATION OUTLINE
1.
FOSSILS IN ROCKS
ERYIEAL PEOPLES 1ST CORE
Photo by
Bill & Mark Bell
2.
MOLDS AND CASTS
Most fossils that form in sedimentary rocks are molds and cast.
An organism dies and falls into soft sediment over time.
The sediments become rocks and the organism decay leaving a mold.
Minerals fill the mold and makes a cast of organism.
3.
PETRIFIED WOODS
WHEN PLANTS MATERIAL IS BURIED BY SEDIMENT AND PROTECTED FROM DECLAY BY OXYGEN AND ORGANISM.
4.
CARBON FILMS
usually form when sediment buries a dead organism as sediments piles up.
The organisms remains are subjected to pressure heat .
5.
TRACE FOSSILS
Are not part of an animal or impressions of it.
Trace fossils include preserved foot praints trails,animals holes and even feces.
6.
PRESERVED FOSSILS
when animals and plants die they typically decay completely.
But sometimes when the conditions are just right ,they're preserved fossils.
7.
MOLDS AND CASTS
EXAMPLES:EXAMPLES: FOSSIL SHELLS ARE OFTEN CASTS, AND SHELL IMPRESSIONS ON ROCK ARE OFTEN MOLDS. A FOSSILIZED FOOTPRINT IS A MOLD. PLANT FOSSILS AND TRILOBITES ARE OFTEN FOUND ...
8.
PETRIFIED WOODS
EXAMPLES:THE MOST NOTABLE EXAMPLE IS THE PETRIFIED FOREST IN ARIZONA.[3]
9.
CARBON FILMS
EXAMPLES:ARE MOLECULES, BUT THE BONES OF A DEAD MOLECULE. ... THE CARBON FILM CONSISTS OF PLASMA POLYMER FILMS, AMORPHOUS CARBON FILMS, AND ...
10.
TRACE FOSSILS
EXAMPLES: BURROWS, BORINGS (BIOEROSION), UROLITES (EROSION CAUSED BY EVACUATION OF LIQUID WASTES), FOOTPRINTS AND FEEDING MARKS, AND ROOT CAVITIES.
11.
PRESERVED FOSSILS
EXAMPLES:THE TERM ALSO IS USED TO DESCRIBE THE FOSSIL FUELS READ MORE:
HTTP://WWW.SCIENCECLARIFIED.COM/EX-GA/FOSSIL-AND-FOSSILIZATION.HTML#IXZZ3SZ...
eryieal peoples
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