Name/Title
Limb CastEntry/Object ID
78.61.26Description
Assemblage Zone: calcareous sediments
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Common name: Petrified Wood
Composition: SiO2
Location data: Indian Creek, Shady Cove, Jackson County, OR
Description: (Delmar) Slice of a colorful limbcast. Polished side shows agate in pinks, reds, greens, oranges, and white. Numerous cracks are obvious. Central colors are in blotches with a more uniform green ring around the outer edge.
Type of Fossils Present: Plants
Fracture: conchoidal
Grain Size: Fine
Hardness: 7 Quartz
Lithofacies: Volcanic Ash / lake sedim
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: microcrtystalline
Variety: Petrified woods ar hydrous microcrystalline varieties of quartz that can be generally termed as chalcedony .Collection
Petrified Wood CollectionAcquisition
Accession
78.61Source or Donor
Delmar Smith Limb Cast CollectionAcquisition Method
DonationOther Names and Numbers
Other Number
Other Number: 1978.61.26Dimensions
Height
14 inWidth
1/2 inLength
7-13/16 inDimension Notes
Dimensions taken at widest pointsLocation
Location
Container
n/aDrawer
Top ShelfShelf
Right, RightBuilding
Founders RoomCategory
PermanentMoved By
Ray BlohmDate
January 10, 2012Location
Container
n/aDrawer
Top ShelfShelf
Right, RightWall
WestBuilding
Founders RoomCategory
PermanentMoved By
Ray BlohmDate
January 10, 2012Location
Shelf
BottomCabinet
Case # 5Room
Mentzer HallBuilding
Crater Rock MuseumCategory
Permanent