Term
|
Definition
Cambrian-recent
Very abundant: Palaeozoic
K/T made them less abundant |
|
|
Term
|
Definition
Middle Cambrian-recent
Palaeozoic overshadowed by brachiopods |
|
|
Term
|
Definition
Late-Cambrian Present
Abundant in Palaeozoic, Mesozoic, before Silurian: top predators |
|
|
Term
|
Definition
| extermally shelled currently living in the West-Pacific |
|
|
Term
|
Definition
extinct now, Jura-Creataceous
internal support of a squid like creature |
|
|
Term
|
Definition
| U. Cam-Recent: extrenally shelled, straight or curved |
|
|
Term
|
Definition
| L.Devon-Upper Cretaceous, K/T extinction |
|
|
Term
|
Definition
|
|
Term
|
Definition
| Cambrian-Recent rare till Ordovician |
|
|
Term
| Rugose and tabulate coral time |
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
Ordovician - Recent
In Palaeozoic dominated shallow marine (especially Carboniferous) |
|
|
Term
|
Definition
|
|
Term
|
Definition
| Early Cambrian – Late Permian |
|
|
Term
|
Definition
|
|
Term
|
Definition
| Mid Cambrian to Carboniferous |
|
|
Term
|
Definition
| Graptolite fossils are often found in shales and mud rocks where sea-bed fossils are rare, this type of rock having formed from sediment deposited in relatively deep water that had poor bottom circulation, was deficient in oxygen, |
|
|
