Name/Title
Black LocustEntry/Object ID
06.58.35Description
Assemblage Zone: sedimentary
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Family: Leguminosae
Genus: Robinia
Common name: Black Locust
Age: Oligocene
Location data: Roxy Ann Formation, Jackson County, Oregon
Roxy fm.
Description: Doug Foster describes this specimen as a round slab from an old trunk dug out on E. Steven Road east of Eagle Point, OR
Type of Fossils Present: Plants
Grain Size: Fine
Hardness: 7 Quartz
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
Petrified Wood CollectionAcquisition
Accession
06.58Source or Donor
Petrified Wood CollectionAcquisition Method
DonationOther Names and Numbers
Other Number
Other Number: 06.58.35Dimensions
Width
8 inDepth
1/2 inLength
8-3/8 inDimension Notes
Dimensions taken at widest pointsLocation
Location
Container
CenterDrawer
2nd ShelfShelf
LeftCabinet
Case #107Wall
North WallBuilding
Mentzer Hall- Petrified Wood RoomCategory
Permanent
