Name/Title
Petrified WoodEntry/Object ID
07.58.52Description
Assemblage Zone: volcanic tuff
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Age: Miocene
Location data: Granger Creek, Modoc County, California USA
Description: Wood branch is in a fine grained volcanic tuff material which is brown to reddish the branch is shown a complete stick with simlar colors to the tuff as tanish brown to reddish brown
Size of branch: diameter 1/2 " length 6 1/2"
Type of Fossils Present: Plants
Fracture: conchoidal
Grain Size: Fine
Hardness: 7 Quartz
Lithofacies: Flood Basalt
Luster: Glassy
Occurrence: Silicified wood, which is the fossilization and/or 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 in the wood is then replaced by silica, other minerals determined the colors of the petrified wood.
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: microcrystalline
Variety: Petrified wood is hydrous microcrystalline variety of quartz that can be defined in general term of chalcedonyCollection
Petrified Wood CollectionAcquisition
Accession
07.58Source or Donor
Petrified Wood CollectionAcquisition Method
DonationOther Names and Numbers
Other Number
Other Number: 2007.58.52Dimensions
Width
1/2 inDepth
3/4 inLength
6-1/2 inDimension Notes
Dimension taken at widest pointsLocation
Location
Shelf
3rd center right sid, 3rd center right sidWall
right - southRoom
Wood roomBuilding
Mentzer Hall - Petrified Wood RoomCategory
PermanentMoved By
Catherine BoydDate
March 6, 2008Location
Shelf
right 2nd on the lef, right 2nd on the lefWall
right - southRoom
Wood roomBuilding
Mentzer Hall - Petrified Wood RoomCategory
PermanentMoved By
Catherine BoydDate
March 6, 2008Location
Container
CenterDrawer
2nd ShelfShelf
RightCabinet
Case #101Wall
South wallBuilding
Mentzer Hall - Petrified Wood RoomCategory
Permanent
