Name/Title
WoodworthiaEntry/Object ID
78.58.439Description
Assemblage Zone: sedimentary
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Family: Protopinaceae
Genus: Woodworthia
Species: Arizonica
Common name: Woodworthia
Age: Late Triassic
Location data: Chinle Formation, Arizona, USA
Delmar describes this pieces as 1/2" (1.2cm) thick slice of petrified wood , "Woodworthia" from Arizona. This is Delmar Smith's favorite piece for the wood patterns in the woodworthia. Polished side shows wood in beiges, tans, greys and some pinkish and bluish color. Numerous crystal cracks seen. Probably from Jurassic period (Mesozoic era)
Size: 9.500"x 9.500"x .500"
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: 1978.58.439Dimensions
Width
9-1/2 inDepth
1/2 inLength
9-1/2 inDimension Notes
Dimensions taken at widest pointsLocation
Location
Container
CenterDrawer
Top ShelfShelf
LeftCabinet
Case #103Wall
East WallBuilding
Mentzer Hall - Petrified Wood RoomCategory
PermanentLocation
Shelf
top far right, top far rightWall
EasternRoom
Wood roomBuilding
Mentzer Hall - Petrified Wood RoomCategory
Permanent
