Name/Title
Brecciated Petrified WoodEntry/Object ID
05.58.131Description
Assemblage Zone: debris flow deposits
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Common Name: Brecciated Petrified Wood
Location data: Knutson Creek, Jackson County, Oregon, USA
Age: Oligocene
Description: Polished cut slab, shows growth rings & rays, multi-colored brown, yellow, grey, white, orange tones.
Type of Fossils Present: Plants
Fracture: conchoidal
Grain Size: Course
Hardness: 7 Quartz
Lithofacies: pyroclastic flow
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: Moderate
Rock Color: Medium
Rock Origin: Post-depositional
Rock Type: Sedimentary
Specific Gravity: 2.6
Surface Process: Not apparent
Streak: white
Temperature: Low to moderate
Texture: Matrix course brecciated appearance - Chips preserves the original wood texture
Variety: Chips of petrified wood have been recemented, much like a conglomerate. Petrified woods here are hydrous microcrystalline variety of quartz that can be generally termed as chalcedony.Collection
Petrified Wood CollectionAcquisition
Accession
05.58Source or Donor
Petrified Wood CollectionAcquisition Method
DonationOther Names and Numbers
Other Number
Other Number: 2005.58.131Dimensions
Width
5-1/2 inDepth
1/2 inLength
6-1/2 inDimension Notes
Dimension taken at widest pointsLocation
Location
Shelf
top shelf on right, top shelf on rightWall
right - southRoom
Wood roomBuilding
Mentzer Hall - Petrified Wood RoomCategory
PermanentMoved By
Catherine BoydDate
March 6, 2008Location
Shelf
top shelf in the mid, top shelf in the midWall
right - southRoom
Wood roomBuilding
Mentzer Hall - Petrified Wood RoomCategory
PermanentMoved By
Catherine BoydDate
March 6, 2008Location
Shelf
Middle top shelf rig, Middle top shelf rigWall
right - southRoom
Wood roomBuilding
Mentzer Hall - Petrified Wood RoomCategory
PermanentMoved By
Catherine BoydDate
March 6, 2008Location
Container
CenterDrawer
Top ShelfShelf
RightCabinet
Case #100Wall
South wallBuilding
Mentzer Hall - Petrified Wood RoomCategory
Permanent
