Sedimentary Rock Identification

Does the rock contain visible sediment particles?

1. Yes...go to 2.
2. No...go to 1.

1. No visible sediment particles.

   Rock Color	Description	Rock Name
   Light color	light pink, white or gray color, reacts with acid, may contain oceanic fossils, made up mostly of calcite from ocean water.	Limestone
   	light gray, tan or brown color, chalky feel, made up of silt (grain size between clay and sand).	Siltstone
   Dark color	black, usually shiny, smudges fingers, low density, made up of plant remains.	Coal
   	shades of gray or red, usually layered, breaks along flat surfaces, made of mud or clay.	Shale/mudstone

2. Visible sediment particles. Does the rock contain shells or pieces of shell?
   1. Yes...go to 3.
   2. No...go to 4.
3. Visible sediment particles with shells

   Description	Rock Name
   Light in color, made up almost entirely of shells or pieces of shell cemented together.	Coquina

4. Visible sediment particles with no shells

   Sediment Particle Size	Description	Rock Name
   Mixed - both large and small.	multicolored, made up of large angular rock fragments cemented together.	Breccia
   	multicolored, made up of large rounded rock fragments cemented together with smaller sediments.	Conglomerate
   Mostly the same size.	maroon color, made up mostly of sand-size particles with some pebbles cemented together, particles are mostly quartz and orthoclase.	Arkose
   	light color (usually white to tan), made up of sand-size particles cemented together, particles are mostly quartz.	Sandstone