Name/Title
Petrified WoodEntry/Object ID
78.58.89Description
Assemblage Zone: Sedimentary
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Family: Taxodiaceae
Genus: Sequoiadendron
Common name: Sequoia
Age: Oligocene Epoch (Tertiary Period, Cenozoic Era)
Location data: Crabtree Creek, Sweethome, Oregon
Description: Petrified Wood. Polished side shows a dark center in gray with brown edging, surrounded by golden brown wood. Piece is cut with grain.
Type of Fossils Present: Plants
Fracture: conchoidal
Grain Size: Fine
Hardness: 7 Quartz
Luster: Glassy
Occurrence: Silicified wood, which is the fossilization and opalization of organic woody matter by the deposition 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 or related volcanic mudflow. The organic material in the wood is then replaced by silica (SiO2), other minerals determined its colors.
Pressure: Low-Moderate
Rock Color: Medium
Rock Origin: Post-depositional
Rock Type: Sedimentary
Specific Gravity: 2.6
Surface Process: Not apparent
Streak: white
Temperature: Low
Texture: Mircrocrystalline
Variety: Petrified woods here are hydrous microcrystalline variety of quartz that can be generally termed as chalcedony.Collection
Petrified Wood CollectionAcquisition
Accession
78.58Source or Donor
Delmar Smith Petrified Wood CollectionAcquisition Method
DonationDimensions
Height
4-1/2 inWidth
2 inLength
3-13/16 inDimension Notes
Dimension taken at widest pointsLocation
Location
Shelf
CS-I-2Room
Curation StorageBuilding
Crater Rock MuseumDate
January 31, 2024Location
Container
n/aDrawer
2nd ShelfShelf
RightCabinet
F2Wall
WestBuilding
Founders RoomCategory
Permanent
