Lecture 3 Flashcards
trace fossils (tracks, trails, burrows, and borings) of ancient animals tell us about –
behavior, nature of soft-bodied, and nature of environment
trace fossils are also known as
ichnofossils
founder of ichnology
Adolf Seilacher
T/F: trace fossils are more abundant in – environments
marine
ichnofabric index measures progressive destruction with # – being the most disturbed
5
spiral rock
gyrolith
simplest ichnogenera of U shapd burrows
arenicolites
Diplocraterion yoyo ichnogenera may have protrusive and retrusive –
spreite
T/F: can have three kinds of ichnogenera from one crustacean
true
vertical shaft ichnogenera
ophiomorpha
horizontal tunnel ichnogenera
thalassinoides
Seilacher’s ethological classification of trace fossils: resting, dweling, – , graxing, and crawling
feeding
trace fossil preservation top of bed
concave epirelief
trace fossil preservation bottom of bed (Dinosaur prints in roof of coal mine, Queensland)
convex hyporelief
high energy environment = food in water = – feeders
suspension