Lecture 3 Flashcards

1
Q

trace fossils (tracks, trails, burrows, and borings) of ancient animals tell us about –

A

behavior, nature of soft-bodied, and nature of environment

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2
Q

trace fossils are also known as

A

ichnofossils

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3
Q

founder of ichnology

A

Adolf Seilacher

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4
Q

T/F: trace fossils are more abundant in – environments

A

marine

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5
Q

ichnofabric index measures progressive destruction with # – being the most disturbed

A

5

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6
Q

spiral rock

A

gyrolith

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7
Q

simplest ichnogenera of U shapd burrows

A

arenicolites

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8
Q

Diplocraterion yoyo ichnogenera may have protrusive and retrusive –

A

spreite

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9
Q

T/F: can have three kinds of ichnogenera from one crustacean

A

true

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10
Q

vertical shaft ichnogenera

A

ophiomorpha

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11
Q

horizontal tunnel ichnogenera

A

thalassinoides

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12
Q

Seilacher’s ethological classification of trace fossils: resting, dweling, – , graxing, and crawling

A

feeding

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13
Q

trace fossil preservation top of bed

A

concave epirelief

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14
Q

trace fossil preservation bottom of bed (Dinosaur prints in roof of coal mine, Queensland)

A

convex hyporelief

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15
Q

high energy environment = food in water = – feeders

A

suspension

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16
Q

low energy environment = food in sediment = – feeders

A

deposit

17
Q

trace fossils associated with the environment

A

ichnofacies

18
Q

high energy ichnofacies = gyrolithes, cruziana, and –

A

skolithos

19
Q

low energy ichnofacies

A

helminthoida = grazing (in sediment)

20
Q

archetypical ichnofacies: most facies are found in – water depths

A

most

21
Q

T/F: trace fossils are part of the Cambrian explosion

A

true

22
Q

GSSP between Ediacaran and Cambrian is located in SE Newfoundland at the first appearance datum (FAD) of the distinctive trace fossil

A

Treptichnus pedum (convex hyporelief)

23
Q

Treptichnus pedum is probably a –trace

A

priapulid