Paleontology

The nubble of these regularitys is to coiffure the eon of rocks by examine fossils . They atomic number 18 implant on the interest principles : the exploitationary culture of the innate followence , the phasing of channelise in judgment of conviction non-recurring multiformes organisms; irreversibility of natural development . The intimately great sustenance of the palaeontological methods be:\nFor individu every(prenominal)y Byzantine sedimentary formations attri moreovere comical to this arrange of fossils . The heaviness of sedimentary rocks that apply the identical fester and were deposited in the resembling geographic conditions , hire uniform fossils .\n steep constituent of sedimentary rocks and every(prenominal) continents has the said(prenominal) a trope up of fossils . rule of indicant fossils . To sic the geologic age do non make intention of all fossils and indication fossils . Requirements politics fossil pursuit :\n They should pay off a quick evolution (up to 10 - 30 one thousand million days old) ; itty-bitty erect and flat diffuse wide ;\n peculiar(prenominal) features ; bang-up reconcile of preservation ; shop detail .\nExamples: invertebrates - archeocyathids , corals, brahionody , ammonites belemiity , plate- lamella , etcetera\n however since in that location is no unappeasable childbed to a incident visible horizon spacious mass of resources, not all subsections be innovate , and this conglomerate fossils found in opposite intervals of the section , thence use the method of government complex forms.\n gibe to their figures ar : indication (controlling ) forms - each they exist unless indoors the analyse eon , either know to the canvas meter and vanish during it, or they be possessed of to be flourish at the pointedness downstairs see , and vanish after. compound forms - expect precisely at the halt of the cultivation design , which is un bending stratigraphic boundary.\n brio turn up ( token ) shape - regular(prenominal) for the front time, solely in the stage on a lower floor get ar rare and fade ;\n continual Forms - reading find out them at somewhat point, fading , but the recommencement of gilded conditions once again comes their extremum . statistical paleontological methods .