Read the introduction to "Fossil Mammals of Asia: Neogene Biostratigraphy and Chronology," Edited by Xiaoming Wang, Lawrence J. Flynn, and Mikael Fortelius
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Fossil Angels was written by Alan Moore in December 2002, and was to appear in KAOS #15. KAOS #15 never actually appeared, and the piece has been without a home since then. I was lucky enoug…Descripción completa
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Catalog ceasuri Fossil - enjoyFull description
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There’s a lot of talk about of fossil fuels such as natural gas, oil, coal, lignite and whether they should be replaced by biomass briquettes as the source of renewable energy- energy that w…Full description
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There is a wealth of information regarding Rocket Stoves all over YouTube and the web, and numerous variations on the basic design. I encourage you to do some research. Good places to start are ht...
There is a wealth of information regarding Rocket Stoves all over YouTube and the web, and numerous variations on the basic design. I encourage you to do some research. Good places to start are ht...
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an ever increasing list of chemical terms
an ever increasing list of chemical termsDescripción completa
Mohamed Fouad ALY
Historical Geology (G 102)
Fossils and Fossilization Dr. Osama E.A. Attia
What is a
Fossil?
(from Latin fossus, literally "having been dug up")
“Remains or traces of any recognizable organic structure, whether of plants or animals, preserved in rocks to indicate extinct life” What conditions promote fossilization?
1- Rapid Burial
2- Hard Skeleton
3- Suitable Environment
4- Lack of Oxygen
Fossilization: It covers the survival of the
organism's remains after death and its transition into a fossil.
Is It fossil or Not?
Mohamed Fouad ALY
1. Actual Remains of the Organism: a- Remains of the entire organism: ex. Mammoth
1. Actual Remains of the Organism: a- Remains of the entire organism:ex. Insect in Amber
Mohamed Fouad ALY
1. Actual Remains of the Organism: b- Remains of the original hard parts
2. Altered Remains of the Organism: a- Carbonization
b- Permineralization
Mohamed Fouad ALY
2. Altered Remains of the Organism: C- Replacement: ex. Petrified wood
Mohamed Fouad ALY
2. Altered Remains of the Organism: C- Replacement:
3. Preservation of the Original form: b- Imprints: ex. Leaf Imprints ex. Fish Imprint
Mohamed Fouad ALY
4. Preservation of tracks of the organism: a- Foot Prints
Mohamed Fouad ALY
4. Preservation of tracks of the organism: b. Tracks: an impression made by a single foot. c. Trackway: a number of tracks made during a single trip. d. Trail: an impression made by an animal without leg. e. Burrow: a hole or holes an animal dug into loose sediment (like mud). f. Borings: a hole or holes an animal dug into a hard substrate (like wood or rock).
Mohamed Fouad ALY
5. Preservation of Coprolites: Coprtolites = korpos meaning “dung” and ; litho meaning “stone”
Mohamed Fouad ALY
Preservational Conditions in Marine & Terresterial Environments Terresterial Environment
Conditions of fossilization less favorable. Deposition less common
Marine Environment
Conditions of fossilization much more favorable. Deposition more common
Organisms are not buried Organisms are buried immediately after death immediately after death Chances of preservation Chances of preservation poor very common Few number of organisms my Large number of organisms my covered & preserved as in : covered & preserved in sea volcanic ash, dust, vaves, rivers, bottom and ocean floor lakes, etc… Mohamed Fouad ALY
