Name/Title
Petrified WoodEntry/Object ID
78.58.320Description
Assemblage Zone: sedimentary
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Family: Taxodium
Genus: Sequoia
Common name: Sequoia
Age: Oligocene Epoch (Tertiary Period, Cenozoic Era)
Location data: Sweethome, OR
Description: (Delmar) Petrified wood, possibly Sequoia. Polished side shows wood in gray (in central zone), browns, and golds. Piece is cut with the grain.
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: 1978.58.320Dimensions
Height
5-3/16 inWidth
1-1/2 inLength
4-11/16 inDimension Notes
Dimensions taken at widest pointsLocation
Location
Shelf
CS-I-2Room
Curation StorageBuilding
Crater Rock MuseumDate
January 31, 2024Location
Container
Front RowDrawer
2nd ShelfShelf
LeftCabinet
F2Wall
WestBuilding
Founders RoomCategory
Permanent
