Name/Title
Petrified WoodEntry/Object ID
05.58.211Description
Assemblage Zone: sedimentary
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Family: Araucariaceae
Genus: Araucarioxylon
Species: Arizonicum
Common Name: Araucaria or Monkey Puzzle
Age: Triassic
Location data: Chinle Formation, Arizona
Description: Polished face shows colors of white, orange, yellow, black, brown, grey, purple and pinkish tones, growth rings are apparent. The slab is a complete round
Location data: Chinle Formation, Circle Cliffs, Utah
Description: Doug Foster describes this specimen as being a butt cut slab from a round trunk. Tan and brown-reddish tan on the outside and on the bark side. Black, tan, cream and reddish-tan on the inside.
Type of Fossils Present: Plants
Grain Size: Fine
Hardness: 7 Quartz
Lithofacies: flood basalts
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 CollectionDimensions
Height
6-1/2 inWidth
1 inLength
3-1/2 inDimension Notes
Dimensions taken at widest pointsLocation
Location
Shelf
CS-I-2Room
Curation StorageBuilding
Crater Rock MuseumDate
January 31, 2024Category
PermanentMoved By
Curtis GardnerDate
May 25, 2023Notes
Added current location
