Clark Reservation

Ferns

• 26 different species of ferns.• Clark Res. Is the primary site for preserving the

endangered American hart’s tongue fern.

This is a bryozoan – most are marine, colonial animals that generally build stony skeletons of calcium carbonate, superficially similar to coral Bryozoa are also known as moss animals. They generally prefer warm, tropical waters. They require a hard or firm substrate on to which the attach to or encrust, and clear agitated water from which they obtain their suspended food.

The word 'colonial' needs more explanation. It is applied to types of animals which reproduce (among other ways) by budding new parts from the original animal.

Cephlapod -Straight-shelled nautiloid creature

Stromatolites – do you remember seeing rocks that had concentric rings?

Individual structure

How it may have looked in New York State?

How one might form

Stromatolites - layered accretionary structures formed in shallow water by the trapping, binding and cementation of sedimentary grains by biofilms of microorganisms, especially cyanobacteria (commonly known as blue-green algae).[1] Stromatolites provide some of the most ancient records of life on Earth by fossil remains which date back more than 3.5 billion years ago.

Stromatolites - layered accretionary structures formed in shallow water by the trapping, binding and cementation of sedimentary grains by biofilms of microorganisms, especially cyanobacteria (commonly known as blue-green algae).[1] Stromatolites provide some of the most ancient records of life on Earth by fossil remains which date back more than 3.5 billion years ago.

What is a crinoid?