Invertebrate traces from North America

See images from the:

		Quaternary
		Tertiary
		Cretaceous
		Jurassic
		Triassic
		Permian
		Carboniferous
		Devonian
		Silurian
		Ordovician
		Cambrian
		Precambrian

Unknown
From the Precambrian in California
© 2004 UCMP

Rusophycus
From the Silurian in Kentucky
© 2001 Richard Schrantz

Arthrophycus
From the Silurian in West Virginia
© 2003 Thomas Kammer

Skolithos
From the Cambrian in West Virginia
© 2003 Thomas Kammer

Oldhamia
From the Cambrian in Alaska
© 2003 Roland Gangloff, University of Alaska Museum

Ophiomorpha
From the Tertiary in New Jersey
© 2003 Otto S. Zapecza

Planolites
From the Triassic in New Jersey
© 2003 Otto S. Zapecza

Rusophycus
From the Silurian in New Jersey
© 2003 Otto S. Zapecza

Zoophycos
From the Devonian in New York
© 2003 Jane Picconi