Microfossils Flashcards
1
Q
Conodonts
A
Cambrian to early Jurassic
Calcium phosphate
Chevron stacked muscles
Found disarticulated
2
Q
Ostracods
A
0.2-0.3mm
Ordovician - recent
Chitinous or calcareous
Benthic, planktonic, parasitic
Bivalved crustaceans - kidney bean shaped
3
Q
Vase Shaped
A
20-300um
Tonian - Ediacaran
Organic (very durable)
Marine (but have aquatic decendents)
4
Q
Small Shellies
A
<2mm
Ediacaran to Cambrian
Phosphatic (due to taphonomic changes?)
Freshwater and marine
Wastebasket designation
5
Q
Cyanobacteria
A
1 - 100um
Precambrian - recent
Organic
Marine and aquatic (photic zone)
Single cells, clusters, small strands
