The document summarizes the main types of sedimentary rocks found at Watkins Glen State Park, including shale composed of clay particles, limestone made of calcium carbonate which may contain fossils, and sandstone made of cemented sand grains. It also notes that these sedimentary rocks form distinct horizontal layers within the Glen and that joints, or large vertical cracks, can occur between the layers.

1. Sedimentary Rocks in the Glen There are three main types of sedimentary rocks that are found: 1- Shale 2 – Limestone 3 - Sandstone http://en.wikipedia.org/wiki/Watkins_Glen_State_Park

2. Sedimentary Layers of the Glen Shale Limestone Sandstone Composed mostly of tiny clay particles of the kind found in mud, much smaller than sand particles Composed of calcium carbonate (calcite), which may have been chemically precipitated in the sea, or else deposited by living organisms in the sea; often contains fossils of sea life Basically sand grains cemented together, which may have been deposited as sand dunes, sand bars, or washed into the sea. http://www.backyardnature.net/g/rox-sed.htm

3. Sedimentary Rock Formations Joints can be found in sedimentary rocks. They are large vertical cracks that run through horizontal layers of sedimentary rocks. (Cooper, 2009) Another look at the layers within the Glen.