Name/Title
Limb CastEntry/Object ID
78.61.9Description
Assemblage Zone: calcareous sediments
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Family: Unknown
Genus:
Common Name: Limbcast
Age:
Location data: Dead Indian Country, Little Butte Creek, Jackson County, OR
Description: Blue-gray in color with darker fortification lines around a small cream colored center. Center is open on backside. White thin covering surrounds edge of cast.
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: 1978.61Dimensions
Width
6-3/8 inDepth
3/4 inLength
5-1/2 inDimension Notes
Dimensions taken at widest pointsLocation
Location
Container
CenterDrawer
4th ShelfShelf
Left, LeftWall
WestBuilding
Mentzer Hall - "Caps Collectables"Category
PermanentMoved By
Steve MillerDate
March 30, 2011Location
Shelf
LeftCabinet
Case #9Building
Mentzer Hall - "Caps Collectables"Category
Permanent