Name/Title
Petrified WoodEntry/Object ID
2008.1.9Description
Assemblage Zone: sedimentary
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Petrified wood slab
Age: Mid-Miocene
Location data: Trout Creek Formation, McDermitt, Malheur County, Oregon, USA
Description: One of three small round slabs with polished faces colored green, black, tan, surrounded by petrified algae
Size: face 5" x 4" thickness 1/2"
Type of Fossils Present: Plants
Grain Size: Fine
Hardness: 7 Quartz
Lithofacies: ash-flow tuffs
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
Oren Kellenbeck CollectionAcquisition
Accession
2008.1Source or Donor
Oren Kellenbeck CollectionAcquisition Method
GiftDimensions
Width
3/4 inLength
5 inDiameter
4 inDimension Notes
Dimensions taken at widest pointsLocation
Location
Container
LeftDrawer
Top shelfShelf
Right side, Right sideWall
Northeast wallRoom
Main Room, Mentzer HallBuilding
Crater Rock MuseumCategory
PermanentMoved By
Wendy MondryDate
February 11, 2010Location
Cabinet
ToteBuilding
Storage (old gift shop upstairs)Category
Permanent
