Name/Title
SycamoreEntry/Object ID
07.58.54Description
Assemblage Zone: lahar (mudflow)
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Family: Platanaceae
Genus Platanus
Common name: Sycamore
Age: Miocene
Location data: Warner Mountain, Deep Creek, Modoc County, California USA
Description: Wood is encased in lahar material which includes pebbles with a sandstone matrix, polished end shows the encased wood with grain of tan and brown. The outer casing is various shades of brown with a fine matrix
Size: diameter 4 1/2 " length 3 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: brecciated lahar material encasing the microcrystalline wood in center with grain texture
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: 2007.58.54Dimensions
Width
4-1/2 inDepth
3-1/2 inLength
4-1/2 inDimension Notes
Dimension taken at widest pointsLocation
Location
Display Case
PW-12Room
Petrified Wood RoomBuilding
Crater Rock MuseumCategory
PermanentMoved By
Catherine BoydDate
March 6, 2008
