Difference between revisions of "Human earth shapers/ETHS101/Resources/Fossils"
From WikiEducator
| Line 20: | Line 20: | ||
|body= | |body= | ||
| − | Molluscs and brachiopods are shelled animals. Their hard parts make them common in the fossil record. | + | [[File:Tasmanian Permian Brachiopods.png|thumb|Drawings of two common Tasmanian Permian Brachiopods]]Molluscs and brachiopods are shelled animals. Their hard parts make them common in the fossil record. |
They are/were widespread, varied and abundant. They live/lived in shallow marine environments, such as beaches, tidal zones and offshore, and are also in rivers and lakes. | They are/were widespread, varied and abundant. They live/lived in shallow marine environments, such as beaches, tidal zones and offshore, and are also in rivers and lakes. | ||
| Line 28: | Line 28: | ||
Molluscs have been around since the Cambrian. Three shelled forms of molluscs are common fossils. These include bivalves, with two shells that are the same (e.g clams), cephalopods with straight or coiled shells (octopus, cuttlefish) and gastropods which have coiled shells (snails). | Molluscs have been around since the Cambrian. Three shelled forms of molluscs are common fossils. These include bivalves, with two shells that are the same (e.g clams), cephalopods with straight or coiled shells (octopus, cuttlefish) and gastropods which have coiled shells (snails). | ||
| − | + | Drawings of two common Tasmanian Permian Brachiopods. The one on the left is Productid variety with a flat top shell (or valve) and a lower scooped valve. It had spines on the shell. The one on the right is a Spiriferid variety shown in plan view (top) and side view (bottom). | |
Revision as of 00:21, 8 July 2019
Fossil Library