• Jasper Forest is magical in twilight, particularly the logs on stone pedestals

    Petrified Forest

    National Park Arizona

Plant Megafossils

petrified wood

Petrified wood may not have bark, limbs, roots, or leaves, but it often has distinctive characteristics that help scientists identify it.

NPS/MARGE POST

Late Triassic plant megafossils found in Petrified Forest National Park
Compiled by Dr. Sid Ash, September 2003

* species based on fossils collected in the park
** species and genotype based on fossils collected in the park

Lycopods
Chinlea campii**
Chinlea
sp.

Horsetails
Equisetites bradyi*
Equisetites
spp.
Equicalastrobus chinleana**
Neocalamites virginiensis
Neocalamites
sp.

Ferns and Fernlike Foliage
Cladophlebis daughertyi*
C. yazzia*
Cladophlebis
spp.
Clathropteris walkeri*
Cynepteris lasiophora*
Itopsidema vancleaveii**
Phlebopteris smithii*
Sphenopteris arizonica*
Todites fragilis*
Wingatea plumosa**


Cycads
Aricycas paulae**
Charmorgia dijolli**
Lyssoxylon grigsbyi**


Cycadeoids
Zamites powellii

Ginkgoes
Baiera arizonica*

Cordaites
Dadoxylon chaneyi*

Conifers
Araucariorhiza joae**
Araucarioxylon arizonicum
Brachyphyllum hegewaldia*
Pagiophyllum simpsonii*
Podozamites arizonicus*
Samaropsis puerca*

Position Uncertain
Carpolithus chinleana*
Dinophyton spinosus**
Marcouia neuropteroides**
Pramelreuthia yazzi*
Schilderia adamanica**
Woodworthia arizonica**

Did You Know?

Agate House pueblo made with petrified wood chunks

Petrified wood was so abundant when the ancestral Puebloan people were living in the area that they used it not only for stone tools but also as building material, such as the "brick" used in Agate House at Petrified Forest National Park.