Name/Title
Petrified WoodEntry/Object ID
07.58.84Description
Assemblage Zone: Flood volcanism
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Crushed recemented petrified wood chips
Age: Miocene
Location data: Columbian River Basalt Formation, Washington State, USA
Description: Black, brown, tan and some grey tones brecciated wood chips cemented together.
Size: face 6" x 5" thickness
Type of Fossils Present: Plants
Fracture: conchoidal
Grain Size: Course
Hardness: 7 Quartz
Lithofacies: Grand Ronde Basalt
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 volcanic related mudflow. The organic material is then replaced by (SiO2) silica, 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
Temperature: Low
Texture: Matrix course conglomerate appearance - Chips preserves the original wood texture
Variety: These chips of petrified wood have been recemented, much like a conglomerate. Petrified woods ar hydrous microcrystalline varieties of quartz that can be generally termed as chalcedony .Collection
Petrified Wood CollectionAcquisition
Accession
07.58Source or Donor
Petrified Wood CollectionAcquisition Method
DonationOther Names and Numbers
Other Number
Other Number: 2007.58.84Dimensions
Dimension Notes
Dimension taken at widest pointsLocation
Location
Container
RightDrawer
Top ShelfShelf
RightCabinet
Case #100Wall
South wallBuilding
Mentzer Hall - Petrified Wood RoomCategory
PermanentLocation
Shelf
top shelf on right, top shelf on rightWall
far rightRoom
MainBuilding
Petrified Wood RoomCategory
Permanent
