Paleo Exam 2

Front 1

Back 1

MOLLUSCA

Gastropoda

Cambrian to Recent

Dextral- right handed

Sinister- left handed

Front 2

Back 2

MOLLUSCA

Gastropoda

Cambrian to Recent

can tell because it does not have the septa on the inside

Front 3

Back 3

MOLLUSCA

Cephalopoda

Nautiloids

Cambrian to Recent

Front 4

Back 4

MOLLUSCA

Cephalopoda

Ammonoid

D (devonian) -K (cretaceous)

Front 5

Nautiloid Anatomy

Back 5

Front 6

Nautiloid and ammoniods

Back 6

Front 7

Difference between Ammonoids and Nautiloids

Back 7

Siphulcle connects the chambers and allows the organism to change its buoyancy by moving fluid around chambers

Front 8

Ammoid Suture Pattern

Goniatitic

Ceratitic

Ammonitis

Back 8

Front 9

Back 9

Piece of an ammonoid fossil that shows the complex folding of the septa

mode of fossilization: cast

Front 10

Back 10

MOLLUSCA

Cephalopoda

Belemnites (squid like like coleoids)

C (carboniferous)-K (cretaceous)

Nektonic (swimmer) Predator

Front 11

Brachiopod vs Bivalve

Back 11

Front 12

Bivavlia Anatomy

Back 12

Front 13

Burrowing Bivalve Anatomy

Back 13

Front 14

Back 14

MOLLUSCA

Bivalvia/ Pelecypoda

Cambrian- Recent

Front 15

Back 15

MOLLUSCA

Bivalvia/ Pelecypoda

Modern Bivalve

Cambrian to Recent

Front 16

Back 16

MOLLUSCA

Bivalvia/ Pelecypoda (on list)

Pecten (not on list)

Cambrian to Recent

Front 17

Back 17

MOLLUSCA

Bivalvia/ Pelecypoda

Arca (not on list)

Cambrian to Recent

Front 18

Back 18

MOLLUSCA

Scaphopoda (on list)

Dentalium (not on list)

?O (ordovician) D (devonian)- Recent

Key Feature that allows you to identify: two openings, one on the top and one on the bottom

Front 19

Back 19

Ammonite

Front 20

Back 20

Baculite Ammonoid

Front 21

Back 21

Some are segments of straight shelled cephalopods, and some are crinoid columnals. the cephalopods do not have spokes while the crinoid does. the crinoids dont taper while cephalopods do

Front 22

Anatomy List

Back 22

MOLLUSKS ANATOMY

Mantle

Siphonal notch/ canal

dextral vs. sinister coiling

siphuncle

sutures

septa

adductor muscle scars

pallial line

pallial sinus

siphon

Front 23

Back 23

MICROFOSSIL

Protista

Foraminifera- Basic Test Structure

Cambrian to Recent

Front 24

Foram Anatomy

Back 24

Front 25

Back 25

MICROFOSSIL

Protista

Foraminifera

Fusulinids

C (carboniferous)- P (permian)

Front 26

Back 26

MICROFOSSIL

Hemichordata

Graptolites- General Structure

Cambrian - C (carboniferous)

Front 27

Back 27

MICROFOSSIL

Hemichordata

Graptolites

Cambrian - C (carboniferous)

Front 28

Graptolites Anatomy

Back 28

Graptolites Anatomy

Front 29

Back 29

MICROFOSSIL

Hemichordata

Graptolites

Phyllograptus (not on list)

Cabrian to Recent

Front 30

Back 30

MICROFOSSIL

Conodonts

Paleozoic and Triassic

Conodonts are most closely related to vertebrates

Front 31

Anatomy List

Back 31

MICROFOSSILS ANATOMY

test

aggluntinated

rhabdosomes

stipe

theca

Front 32

Back 32

ICHNOFOSSILS
Skolithos Ichnofacies (Sandy Shore)

Skolithos

Front 33

Back 33

ICHNOFOSSILS

Skolithos Ichnofacies (Sandy Shore)

Ophiomorpha

Front 34

Back 34

ICHNOFOSSILS

Skolithos Ichnofacies (Sandy Shore)

Diplocraterion

Front 35

Back 35

ICHNOFOSSILS

Cruziana Ichnofacies (Shallow Shelf)

Cruziana

Trilobites hypothesized to be responsible for creating

Front 36

Back 36

ICHNOFACIES

Cruziana Ichnofacies (Shallow Shelf)

Thalassinoides

Front 37

Back 37

ICHNOFACIES

Zoophycos Inchnofacies ("Slope")

Zoophycos

Front 38

Back 38

ICHNOFACIES

Nereites Ichnofacies (Abyssal Zone)

Nereites

Front 39

Back 39

Sedimentary Structure

Mud Cracks- Indicated that the environment was dired out or maybe experienced a drought

Front 40

Back 40

Sedimentary Structure

Tabular Cross Bedding

Front 41

Back 41

Sedimentary Structure

Trough Cross Bedding

Front 42

Ripples

Back 42

Front 43

Climbing Ripples

Back 43

Front 44

High Vs Low Aggredation

Back 44

Front 45

Herringbone

Back 45

you know which way is up because the lines are tangential at the bottom and has sharp contact at the top.

-Preserves the lee side

Front 46

Interference Ripples

Back 46

Sedimentary Structure- where you have active water flow one way for some time and then there is a change in that direction of flow (2 flow directions)

Front 47

Tidal Features

Back 47

Front 48

Graded Bedding

Back 48

Front 49

Rain drop impressions

Back 49

Front 50

Sole Marks- Flute Casts and Took Marks

Back 50

Flute Casts- infil of structure that was on the surface

Tool marks- things are drug accross top (drag, bounce, etc) scouring out and fill in/ form casts

Front 51

Load Casts

Back 51

Upper material oozing down into still squishy stuff below

(top of the lower will have indentation)

Front 52

Ball and pillow structures

Back 52

A little more organized load casts

balls- when pillows get elongated and break off because they oozed down far enough)

Front 53

Flame Structures

Back 53

Mud squished up into overlying sand