Name/Title
Petrified WoodEntry/Object ID
78.58.244Description
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Family:
Genus:
Species:
Common name:
Age: Oligocene Epoch (Tertiary Period, Cenozoic Era)
Location data: Jackson County, Oregon, USA
Description: (Delmar) Brecciated petrified wood. Polished side shows wood chunks in tans, beiges, and browns with visible grain, with silicate filler (some crystalline). One small hole is seen on polished side, and a few smaller ones, all crystalline.
Type of Fossils Present: Plants
Grain Size: Fine
Hardness: 7 Quartz
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 CollectionAcquisition
Accession
78.58Source or Donor
Delmar Smith Petrified Wood CollectionAcquisition Method
DonationOther Names and Numbers
Other Number
Other Number: 1978.58.244Dimensions
Height
4-5/16 inWidth
1-1/2 inLength
4-5/16 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