Name/Title
Petrified WoodEntry/Object ID
2008.1.2Description
Assemblage Zone: sedimentary
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Petrified Wood round
Genus: Araucarioxylon
Species: Arizonicum
Common Name: Araucaria or Monkey Puzzle
Age: Late Triassic about 220 million years old
Location data: Chinle Formation, Washington Co. AZ. USA
Description: Complete round stump of petrified wood. Polished face shows the colors brown, golden to tan, with growth rings. The outer is beige to tan dull bark appearance.
Size: face 8" x 9" height 5"
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: Microcrystaline
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
Height
5 inWidth
9 inDiameter
8 inDimension Notes
Dimensions taken at widest pointsLocation
Location
Container
RightDrawer
Bottom ShelfShelf
Left side, Left sideWall
Northeast wallRoom
Main Room, Mentzer HallBuilding
Crater Rock MuseumCategory
PermanentMoved By
Wendy MondryDate
February 11, 2010Location
Cabinet
ToteBuilding
Storage (old gift shop upstairs)Category
PermanentLocation
Shelf
bottom left, bottom leftWall
far rightRoom
Main, Mentzer HallBuilding
Crater Rock MuseumCategory
Permanent
