Microfossils Flashcards

1
Q

What is a microfossil

A

They are the same as a macro fossil except you need a microscope to see them

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2
Q

What are the types of micro fossils on the syllabus

A
Ostracods
Foraminifera
Conodonts
Radiolarain
Spores and pollen
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3
Q

What is the morphology of Ostracods

A

Two valves
Hinge with teeth
Sockets
Adductor muscles to close them

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4
Q

How big are Ostracods

A

Less than 2mm

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5
Q

What is the shell or carapace made of

A

Chitin or calcium carbonate

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6
Q

Geological range (Ostracods)

A

Cambrian to present

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7
Q

Mode of life (Ostracods)

A

Benthonic

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8
Q

How are they great palaeo-environment indicators

A

They had different forms in waters of the entire range of salinity

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9
Q

What is the protective shell of a foraminifera called

A

A test

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10
Q

What is their size range (Foraminifera)

A

1um-110mm

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11
Q

What is the difference between early forms of Formas compared to more advanced form

A

Early had test glued together while advanced secreted their shell

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12
Q

How do forms capture their food

A

Using thread-like structures through holes of the test

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13
Q

What is the forams geological time

A

Cambrian to present

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14
Q

What is the size of conodonts

A

200um to 5mm

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15
Q

What are they

A

Teeth of soft bodied creatures

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16
Q

Details about conodonts

A

Made of calcium phosphate, apatite

Precambrian to perm-triassic extinction events

17
Q

What are Radiolaria

A

Marine planktonic animals, ranging form 30um to 2mm
Made of silica
preserved below the CCD
Excellent palaeoenvironmemt tools

18
Q

How big are spores and pollen

A

10 and 200 microns

19
Q

Geological time range of spores and pollen

A

Late Silurian