Name/Title
WoodworthiaEntry/Object ID
05.58.74Description
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
Description: Polished cut slab with colors white, black, brown and grey, growth rings are apparent.
Type of Fossils Present: Plants
Fracture: conchoidal
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 deposition 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 or related volcanic mudflow. The organic material in the wood is then replaced by silica (SiO2), other minerals determined its colors.
Pressure: Low-Moderate
Rock Color: Medium
Rock Origin: Post-depositional
Rock Type: Sedimentary
Specific Gravity: 2.6
Surface Process: Not apparent
Streak: white
Temperature: Low
Texture: Mircrocrystalline
Variety: Petrified woods here are hydrous microcrystalline variety of quartz that can be generally termed as chalcedony.Collection
Petrified Wood CollectionAcquisition
Accession
05.58Source or Donor
Petrified Wood CollectionAcquisition Method
DonationOther Names and Numbers
Other Number
Other Number: 2005.58.74Dimensions
Width
5-1/2 inDepth
1/2 inLength
7 inDimension Notes
Dimension taken at widest pointsLocation
Location
Container
LeftDrawer
Top ShelfShelf
LeftCabinet
Case#103Wall
East WallBuilding
Mentzer Hall - Petrified Wood RoomCategory
PermanentLocation
Shelf
Top Left on left sid, Top Left on left sidWall
EasternRoom
Petrified WoodBuilding
Mentzer Hall - Petrified Wood RoomCategory
Permanent
