fossils Flashcards

(68 cards)

1
Q

a body of sediment with distinctive physical, chemical, and biological attributes

A

sedimentary facies

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2
Q

sea level rose with respect to the land

A

marine transgression

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3
Q

when sea level fell with respect to the continent and the environments that paralleled the shoreline migrated seaward

A

marine regression

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4
Q

another aspect of this is that the rocks making up each facies become younger in landward direction

A

marine transgression

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5
Q

this holds that the facies seen in a conformable vertical sequence will also replace one another laterally

A

walther’s law

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6
Q

he recognized that the facies seen in a conformable vertical
sequence will also replace one another
laterally, year of birth and death?

A

johannes walther, 1860-1937

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7
Q

true or false, walther’s law can be applied to rocks above and below an unconformity

A

false, unconformities are unrelated and law does not apply

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8
Q

what are the 3 causes of marine transgression and regression

A

uplift and subsidence
amount of water frozen in glaciers
rates of seafloor spreading

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9
Q

it is the scientific study of fossils

A

paleontology

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10
Q

5 favorable conditions for fossilization

A
  1. possession of hard parts like exoskeleton, bones, nails, and tooth
  2. rapid burial
  3. availability of finer sediments and undisturbed conditions of sedimentation
  4. presence of highly mineralized groundwater
  5. calm water, little oxygen (anoxic environments)
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11
Q

these are the remains or traces of prehistoric organisms preserved in rocks

A

fossils

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12
Q

which rocks are these remains or traces are commonly found

A

sedimentary rocks

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13
Q

3 uses of fossils

A
  1. determine the relative ages of strata
  2. for determining environments of
    deposition
  3. constitute some of the evidence for the
    theory of evolution
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14
Q

type of fossil that are the skeletal parts, shells, bones and teeth

A

body fossils

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15
Q

type of fossil that indicates organic activity such as tracks, trails, burrows, nests, and feces or coprolites

A

trace fossils

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16
Q

original composition and preserved structures of body fossils

A

unaltered remains

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17
Q

bones, insects preserved in asphalt-like substance at oil seeps

A

preservation in tar

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18
Q

one chemical replaces another, e.g. pyrite replaces calcium carbonate of shells

A

replacement

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19
Q

large ice age mammals frozen in sediment

A

freezing

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20
Q

a cavity with the shape of a bone or shell

A

mold

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21
Q

this happens when a cavity with a shape of a bone or shells gets filled by minerals or sediments

A

casts

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22
Q

change in crystal structure, e.g. aragonite in shells recrystallizes as calcite

A

recrystallization

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23
Q

air drying and shriveling of soft tissues

A

mummification

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24
Q

leaves, insects, and small reptiles trapped and preserved in hardened tree resin

A

preservation in amber

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25
change in composition and or structure of original material of body fossils
altered remains
26
addition of minerals to pores and cavities in shells and bones
permineralization
27
volatile elements lost from organic matter leaving a carbon film
carbonization
28
who is the old frozen wooly mammoth
Lyuba
29
how many years were the wooly mammoth fossilized
40,000
30
where was the 30-35 days old wooly mammoth found
yamal peninsula in russia
31
where was the 7-8 months old mammoth found
NE Siberia
32
who is the 7-8 months old mammoth
dima
33
who is the best preserved mammoth fossil in the world
Lyuba
34
this happens when a animal dies in a dry, protected location, like an arid cave and its remains dried out
mummification
35
other term for the drying out of animal remains
desiccation
36
a tail of this dinosaur was found nestled inside a small chunk of amber
coelorosaurs
37
how old was this amber
99 million year old
38
what was the color of this small chunk of amber
golden
39
this can preserve an organism’s skin and soft tissues, which fossilization in sediment usually can’t
desiccation
40
this is the result of petroleum seep where subterranean bitumen leaks to the surface
tar pit, asphalt pit, or asphalt lake
41
a petroleum seep that can be found in LA california
la brea tar pits
42
this happens when animals gets trapped in the sticky residue of a petroleum seep for
tar preservation
43
this is the process of turning living organic material into stone
petrification
44
this happens when the pores of the plant materials, bones, and shells are impregnated by mineral matter from the ground, lakes, or ocean.
permineralization
45
this takes place when water dissolves the original hard parts and replaces them with mineral matter .
replacement
46
this is a process by which the more volatile substances of plants and animals decay, but leave behind the carbon.
carbonization
47
this is an example of the process by which the more volatile substances of plants and animals decay, but leave behind the carbon.
metasequoia leaves of the tranquille shale of british columbia
48
An organism will lie in sediment until the surrounding sediment becomes firm. Later the organism dissolves away. If there is no infilling of the cavity with mineral, sand or clay this is called?
natural mold
49
The outside of the mold, which would have been the outer surface of the animal, is referred to as?
external mold
50
The inside surface of the mold is referred to as?
internal mold
51
other term for trace fossils
ichnofossils
52
fossilized feces that may provide information about the diet and size of the animal that produced it
coprolite
53
these type of trace fossils forms in soft sediments
burrows
54
these are type of trace fossils that are made by organisms into hard substrate
borings
55
what do you call the fossilized stomach stones
gastroliths
56
these fossilized stomach stones were found inside the stomach of?
elasmosaur
57
These are fossils sites from which exception fossils come, with many fossils exhibiting extraordinary quality and completeness of preservation and/or a wide diversity of fauna and/or flora
lagerstätten
58
what are the two major types of lagerstätten
Konzentrat-Lagerstätten Konservat-Lagerstätten
59
who proposed lagerstätten
adolph seilacher
60
these are unusually well-preserved fossils, and these are generally thought of by the term “lagerstätten”
Konservat-Lagerstätten
61
this has anomalously high amounts of fossil material that are possibly by decreased rate of sedimentation, increased rate of organism reposition, and increased rate of organismal death
Konzentrat-Lagerstätten
62
a fossil-bearing deposit exposed in the Canadian Rockies of British Columbia, Canada
burgess shale
63
a ~20 cm Enatiornithine Bird preserved in ventral view on a single slab
sulcavis geeorum
64
it contains multiple exceptionally preserved baby psittacosaurus dinosaurs that were buried alive by an ancient volcanic debris flow
babysitter bone bed
65
these are small, fossilized remains of organisms (animal, plant, or protozoa) that require magnification for study.
microfossils
66
Fossils larger than 2 mm are generally referred to as?
macrofossils
67
these are tiny teeth-like apparatuses belonging to an extinct, worm like, marine organisms.
conodonts
68