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TIMPUL GEOLOGIC Istoria geologica a Pamantului PLAN- GHID pe baza caruia se va realiza proiectul
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Transcript of TIMPUL GEOLOGIC Istoria geologica a Pamantului PLAN- GHID pe baza caruia se va realiza proiectul
TIMPUL GEOLOGIC Istoria geologica a Pamantului
PLAN- GHID pe baza caruia se va realiza proiectul
• http://doru.juravle.com/cursuri/resurse/cursuri_2010-2011/ggp/01.%20GEOLOGIE%20GENERALA%20-%20PREZENTARE%2001%20-%20Notiuni%20introductive.pdf
• http://palaeos.com/
• http://sci.waikato.ac.nz/evolution/EvolutionOfLife.shtml
• http://www.pbs.org/wgbh/nova/link/hist_nf.html
TEMA 16 TIMPUL GEOLOGIC
EVOLUTIA PALEOGEOGRAFICAA TERREI
http://www.ruf.rice.edu/~leeman/aNR.html
http://www.ruf.rice.edu/~leeman/aNR.html
EVOLUTIA VIETII PE TERRA
• 1. GEOCRONOLOGIE• Geocronologia este o ramura a stratigrafie care se
ocupa cu datarea (stabilirea vârstei) depozitelor geologice si ierarhizarea cronologica a acestora, rezultând unitai geocronologice (de timp), concretizate în unitai cronostratigrafice.
• Datarea se poate face– relativ, aplicându-se corelarile pornind de la principiul
superpoziei geometrice a stratelor si evoluiei organismelor biologice
– în mod absolut, folosindu-se metode radiometrice.
• Unitati geocronologice: EON, ERA, PERIOADA, EPOCA, VARSTA, CRON
Eon Era Perioadainceput - sfarsit (mil.ani)
Phanerozoic Eon: PH
Cenozoic Era: CZ
Neogen N 23.0 -
Paleogen E 65.5 - 23.0
Mesozoic Era: MZ
Cretacic K 146 - 65.5
Jurasic J 200 - 146
Triasic T 251 - 200
Paleozoic Era: PZ
Permian P 299 - 251
Carbonifer C 359 - 299
Devonian D 416 - 359
Silurian S 444 - 416
Ordovician O 488 - 444
Cambrian Є 542 - 488
Precambrian: Prc
Proterozoic PR 2500 - 542
Arhaic AR 3850 - 2500
Hadean HA c. 4500 - 3850
Chaotian CH c. 4600-4500
TIMPUL GEOLOGIC
EON ERA SPAN (Mya) Notes and Events
Proterozoic
Paleoproterozoic
2500 - 2300 mya
More or less conventional plate tectonics
Archean
Neoarchean2800 - 2500 mya
First large continental shields
Mesoarchean
3200 - 2800 mya
First widely-accepted fossil evidence of life. First banded iron formations.
Paleoarchean
3600 - 3200 mya
First stromatolites? Formation of relatively stable crust units (possibly even earlier , but see generally negative review .
Eoarchean~3800 - 3600 mya
Debatable geochemical evidence for life (no longer widely accepted)
Hadean Early Imbrian 3850 - 3800
mya Late heavy bombardment of Earth-moon system.
• I. EONUL PRECAMBRIAN -CARACTERIZARE http://palaeos.com/timescale/precambrian.htm1. ARHAIC (The Archean Eon :http://palaeos.com/
• http://palaeos.com/archean/index.html )
2. PROTEROZOIC- CARACTERIZARE http://palaeos.com/proterozoic/proterozoic.htmhttp://palaeos.com/proterozoic/proterozoic.htm
• 1 Geografia Proterozoicului– http://palaeos.com/proterozoic/proterozoic.htm
• 2 Viata in Proterozoic– http://palaeos.com/proterozoic/proterozoic.htm
eon era perioadaA inceput acum(mil ani)
Durata (mil ani)
Fanerozoic
3 Neozoic(Cenozoic)
Neogen 23.0 23.0
Paleogen 65.5 42.5
2 Mezozoic
Cretacic 146 80.5
Jurasic 200 54
Triasic 251 51
1 Paleozoic
Permian 299 48
Carbonifer 359 60
Devonian 416 57
Silurian 444 28
Ordovician 488 44
Cambrian 542 54
II. EONUL FANEROZOIC
II EONUL FANEROZOIChttp://palaeos.com/timescale/phanerozoic.htm#Paleozoic
Erele: Paleozoic, Mezozoic, Neozoic
• ERA PALEOZOIC -CARACTERIZARE• Geografia Paleozoicului (imagini, harti)• Viata in Paleozoic (desene)
– Of the three main eras that make up the Phanerozoic, the Paleozoic is the longest and most diverse, spanning the period from very early multicellular life that only inhabited the oceans to quite advanced tetrapods* and reptiles and extensive forests on land.
– Early Paleozoic: Age of Invertebrates Coelomate radiation (Cambrian explosion) - origin of major groups of organisms; nervous system, behavior patterns and simple consciousness (the nascent Noosphere); continents drift apart.
– Middle Paleozoic: Age of Fish Tropical conditions. Extinction of many "experimental" animal groups; diversification of surviving invertebrate groups, rise of vertebrates (fish). Life moves on land (rhyniophytes, lycophytes, uniramous arthropods, proto-amphibians).
– Late Paleozoic: Age of Tetrapods* and Reptiles Ice age. Coal forests of giant lycopsids, calamites, pteridophytes and ferns cover the tropical landmasses. Southern landmass of Gondwanaland buried under glaciers; continents drift together. Reptiles conquer the land
• ERA MEZOZOIC –CARACTERIZARE DESCRIERE imagini, harti
• Geografia Mezozoicului• Viata in Mezozoic(desene)
– The Mesozoic has been called the "age of reptiles", but "age of dinosaurs" would be more appropriate. There is still controversy over whether dinosaurs really were stupid sluggish ectotherms ("reptiles") or active high-metabolism (endotherm) creatures more like birds. Even if we define them as "reptiles" the age of reptiles as such begins in the Permian period of the Paleozoic era anyway.
– Tropical (Greenhouse) Conditions. Pangaea continues during the early Triassic; then landmasses begin to drift apart. Shallow oceans cover much of the continents, breaking the land into large islands. Mammals remain small, possibly nocturnal. Most modern groups of organisms appear. Vertebrate animals (mammals, birds, theropod dinosaurs) develop larger brains then their earlier reptilian ancestors.