Name/Title
AraucariaEntry/Object ID
2008.1.4Description
Assemblage Zone: sedimentary
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Petrified wood slab
Family: Araucariaceae
Genus: Araucarioxylon
Species: Arizonicum
Common Name: Araucaria or Monkey Puzzle
Age: Late Triassic
Location data: Chinle Formation, Washington Co., Arizona, USA
Description: Slab complete round the polished face is coloerd red, white, black, brown
Size: face 17.25" x 14.25" thickness 1"
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: Mircocrystalline
Variety: Petrified woods here are hydrous microcrystalline variety of quartz that can be generally termed as chalcedony or opal.Collection
Oren Kellenbeck CollectionAcquisition
Accession
2008.1Source or Donor
Oren Kellenbeck CollectionAcquisition Method
GiftDimensions
Width
1 inLength
14-1/4 inDiameter
17-1/4 inDimension Notes
Dimensions taken at widest pointsLocation
Location
Display Case
PW-9Room
Petrified Wood RoomBuilding
Crater Rock MuseumCategory
ExhibitMoved By
Wendy MondryDate
February 11, 2010
