Name/Title
WoodworthiaEntry/Object ID
78.58.209Description
Assemblage Zone: sedimentary
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Family: Protopinaceae
Genus: Woodworthia
Species: Arizonica
Common name: Woodworthia
Age: Late Triassic to Early Jurassic
Location data: Chinle Formation, Central Arizona, USA
Description: Delmar describes this piece as a variety "Woodworthia" from central Arizona. The piece is uncut and unpolished, colored black to a dark brown with crystalline. Probably from the oligocene epoch, (tertiary period, cenozoic era)
Size: 7.00"x 9.500"x 3.750"
Type of Fossils Present: Plants
Grain Size: Fine
Hardness: 7 Quartz
Lithofacies: Fluvial System
Luster: Glassy
Occurrence: Silicified wood, which is the fossilization and opalization of organic woody matter by the deposation of SiO2 in a anaerobic environment to prevent decay. This means that the wood must somehow be buried in an oxygen free enviroment, possibly in the silt-laden river or the bottom of a lake or buried by volcanic ash.
Pressure: Low-Moderate
Rock Color: Medium
Rock Origin: Terrestrial
Rock Type: Sedimentary
Specific Gravity: 2.6
Surface Process: Not apparent
Temperature: Low
Texture: microcrystalline
Variety: Petrified woods here are hydrous microcrystalline variety of quartz that can be generally termed as chalcedony or opal.Collection
Petrified Wood CollectionAcquisition
Accession
78.58Source or Donor
Delmar Smith Petrified Wood CollectionAcquisition Method
DonationOther Names and Numbers
Other Number
Other Number: 1978.58.209Dimensions
Width
9-1/2 inDepth
3-3/4 inLength
7 inDimension Notes
Dimensions taken at widest pointsLocation
Location
Container
RightDrawer
Bottom / Back RowShelf
RightCabinet
Case #104Wall
East WallBuilding
Mentzer Hall - Petrified Wood RoomCategory
PermanentLocation
Shelf
top far right, top far rightWall
EasternRoom
Wood roomBuilding
Mentzer Hall - Petrified Wood RoomCategory
Permanent
