Fossils from the Rillito River near the Tucson Mall


The rillito has run a few times this winter, and we thought there might be new material exposed. We were not dissapointed. Sometimes there's an adventure in your own backyard.
Return To the Tucson Area Page Page
Here is a view of the site. We're not sure if these boulders occur naturally, or if they were put here to control erosion.
Phylum: Brachiopoda
Class: Articulata
Location: Rillito River.
Age: Unknown
Formation: Unknown
Phylum: Echinodermata
Crinoid stems?

Location: Rillito River.
Age: Paleozoic
Formation: Unknown
Phylum: Cnidaria
Class: Anthozoa
Subclass: Zoantharia
Order: Rugosa
Rugose Coral
in cross section with normal faulting
Location: Rillito River.
Age: Paleozoic
Formation: Unknown
Phylum: Brachiopoda
Class: Articulata
Order: Strophomenidina
Suborder: Productid
A Productid with four fully articulated spines
High Resolution Image
Location: Rillito River.
Age: Paleozoic
Formation: Unknown
Phylum: Echinodermata
Crinoid stem
Location: Rillito River.
Age: Paleozoic
Formation: Unknown
Phylum: Brachiopoda
Class: Articulata
Location: Rillito River.
Age: Pennsylvanian/Permian?
Formation: Earp?
Phylum: Arthropoda
Subphylum: Trilobita
Trilobite?
Location: Rillito River.
Age: Cambrian?
Formation: Abrigo?
Phylum: Brachiopoda
Class: Articulata
Location: Rillito River.
Age: Pennsylvanian/Permian?
Formation: Earp?
Phylum: Brachiopoda
Class: Articulata
Order: Spiriferidea
Brachiopod
Location: Rillito River.
Age: Pennsylvanian/Permian?
Formation: Earp?
Phylum: Brachiopoda
Class: Articulata
Brachiopod
Location: Rillito River.
Age: Pennsylvanian/Permian?
Formation: Earp?
Phylum: Brachiopoda
Class: Articulata
Brachiopod
Location: Rillito River.
Age: Pennsylvanian/Permian?
Formation: Earp?
Phylum: Bryozoa
Class: Stenolaemata
Order: Fenestrata
Bryozoa
Location: Rillito River
Age: Pennsylvanian/Permian?
Formation: Earp
Phylum: Echinodermata
Crinoid stem
Location: Rillito River
Age: Paleozoic
Formation:Unknown
Phylum: Echinodermata
Crinoid stem
Location: Rillito River
Age: Paleozoic
Formation:Unknown
Phylum: Brachiopoda
Class: Articulata
Brachiopod
Location: Rillito River.
Age: Paleozoic
Formation: Unknown
Phylum: Brachiopoda
Class: Articulata
Brachiopod
Location: Rillito River.
Age: Paleozoic
Formation: Unknown
Phylum: Cnidaria
Class: Anthozoa
Subclass: Zoantharia
Order: Rugosa
Rugose Coral
Location: Rillito River.
Age: Paleozoic
Formation: Unknown
Return to the Tucson Locations Page