Geology Flashcards
What organism was marine, free living , bottom dwelling, and three lobed?
Trilobite
When looking at fossils in Amber , is it best to look near the site of a prehistoric ?
Forest
Stones used by di assures as an aid in food digestion are known as ?
Gastroliths
An abyssal organism that was bent honor would probably occupy what?
Decomposer
A trace fossil?
Coprolite
What sedimentary rock would most likely contain traces of the soft parts of an animal?
Marine shale
What depositional environment would best preserve a soft-bodied animal such as a marine jelly fish
Lagoon
When rapidly deposited the sedimentary type most likely to preserve a soft-bodied jelly fish is
Mud
A sample of wood composed entirely of silica and in which detailed structures can be seen was probably preserved by ?
Permineralization
The fossil record can be used to show all the following EXCEPT? A) adaptive radiation of a species B) extinction of a species C) habitat of a species D) absolute age of a species
D
A non-inherited change in the genes of an organism is known a as ?
Mutation
Muted butterflies thrived , while brightly colored ones became extinct. This is a example of
Natural selection
What refers to a group of fossils from a specific place and time ?
Fossil assemblage
What term refers to a bedrock which shows steeply dipping Rick layers overlain by horizontal beds ?
An angular unconformity
What is true about unconformities?
They represent time breaks in the geologic record
What did kelvin not know?
Radioactive heating
Fossils are rare in Precambrian rocks because ?
Precambrian organisms had soft shells
A rock layer contains well preserved fossils fossils of several species of trilobite this rock is most likely ?
Marine shale
Fossils give clues of the following EXCEPT?
A)climate changes during Mesozoic era
B) relative age of rocks from the Cenozoic era
C) dating the beginning of the Precambrian era
D) changes form during the Paleozoic era
C) dating the beginning of the Precambrian era
What inviting end is indicated by an assemblage of fossil freshwater calms ?
Lake
Coffins usually found in
Sedimentary rocks
Most Precambrian fossils come from organisms that lived …
In shallow water areas
All Precambrian life forms were
Marine
What term refers to the term an organism plays in it environment
Niche
