Name/Title
WoodworthiaEntry/Object ID
05.58.149Description
Assemblage Zone: sandstone sediments
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Family: Protopinacea
Genus: Woodworthia
Species: arizonica
Common name: Woodworthia
Age: Late Jurassic
Location data: Hansen Creek, Garfield County, Utah USA
Description: Polished cut slab with colors mustard, rust, red and white to clear veins.
Type of Fossils Present: Plants
Fracture: conchoidal
Grain Size: Fine
Hardness: 7 Quartz
Lithofacies: Fluvial System
Luster: Glassy
Occurrence: The time period for this area is Upper Jurassia, throught its topmost beds may at places transgress the Jurassic-Cretaceous boundary. The Morrison Fr. has long been known to contain plant fossils, silicified cycadeoids and tree truncks of the Araucarioxylon type. The petrified wood finds along Hansen Creek have been as large as 2 feet in diameter.
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 or opalized.Collection
Petrified Wood CollectionAcquisition
Accession
05.58Source or Donor
Petrified Wood CollectionAcquisition Method
DonationOther Names and Numbers
Other Number
Other Number: 2005.58.149Dimensions
Width
7-1/4 inDepth
3/4 inLength
8-1/2 inDimension Notes
Dimension taken at widest pointsLocation
Location
Container
RightDrawer
Top ShelfShelf
RightCabinet
Case#104Wall
East WallBuilding
Mentzer Hall: Petrified Wood RoomCategory
PermanentLocation
Shelf
Top far right, Top far rightWall
EastRoom
Petrified WoodBuilding
Mentzer Hall: Petrified Wood RoomCategory
PermanentLocation
Shelf
Top far right, Top far rightWall
EastRoom
Petrified WoodBuilding
Mentzer Hall: Petrified Wood RoomCategory
Permanent
