1. Trace vs. Body Fossils vs. Chemical Fossils
Body Fossil - Part of the Original Body
Shells
Bones
Arthropod molted carapaces
Molds / Casts
Carbonized residue layer
Eggs with embryos inside
Unaltered Remains
Trapped in Amber / Copal
Trapped in Tar
Frozen
Chemical Fossils / Biomarkers
Fossil fuels (oil/bitumen/natural gas/coal)
BioIsotope ratios
Trace/Ichnofossils - Evidence of Behavior
Stromatolites
Trails / Tracks / Trackways / Footprints
Egg Shells
Nests
Burrows
Worm tubes
Bite/Predation marks / Repair Scars
Borings
Skin Impressions
Coprolites and Fecal Pellets (fossil poop)