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fossil vocab

Question	Answer
preserved remains or traces of animals, plants, or other organisms	fossil
formed in by layers by the deposition of weathered rocks. sediments are pressed and cemented together	sedimentary rocks
geologists assume newest rock layers on are top of the older ones unless disturbance occurs	law of supposition
petrification, replacement, permineralization, molds and casts, carbonization, fossil resin (amber),tar and ice, and trace fossils	types of fossilization
both result in organic material converting into stone or a similar substance	petrification
replacement and permineralization are what type of?	petrification
happens when water dissolves the original solid material and replaces them with mineral matter such as calcite, silica, pyrite and hematite this happens slowly	replacement
groundwater carries dissolved minerals into the pores and cavities of bone, wood, or shells, original matter is preserved then replaced, bones , teeth, and shells are preserved.	permineralization
organism dies and and there is no filling of the cavity with minerals	molds
organism dies and the cavity fills with minerals, sand or clay	casts
process by which all substances of plants and animals decay, except carbon, leaves a carbon film on the sedimentary rock, usally occurs in a fish	carbonization
sticky resin captures insects and other invertebrates, hardens ,preserved in the resin including their dna,known has amber	fossil resin
excreted from certain plants, which is thought to protect them from insects and seals off plant injuries	resin
an animal can become trapped in tar and the whole body can be preserved, freezing can trap whole mammals	tar/ice
footprints ,tracks, burrows, feces, and borings	trace fossils
special fossils, easily recognized, abundant, wide spread, lived a short period of time	index fossils
most accurate form of dating	absolute age
rock like structures built by blue-green algae, first forms of life on earth - oldest known fossils	stromatolites
using relative and absolute dating scientists are able to put together the Earth’s geologic history	fossil record
fossils can tell us something about the environment at the time the organism died.	environment

Created by: ldrexler

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