Name/Title
Palm RootEntry/Object ID
78.58.265Description
Assemblage Zone: Sedimentary
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Family: Palmae
Genus: Rhizopalmoxyon
Common name: Palm Root
Age: Mid-Miocene
Location data: Yermo, California
Formation: Bissil
Description: Thick, roughly rectangular slice of petrified wood, polished on both sides. Coloring is pink,brown and grey with balls of agate and eyes in grey and brown.
Size: 3.00"x 6.00"x .250"
Type of Fossils Present: Plants
Fracture: conchoidal
Grain Size: Fine
Hardness: 7 Quartz
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 related volcanic mudflow. The organic material in the wood is then replaced by silica (SiO2), 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
Streak: white
Temperature: Low
Texture: Mircrocrystalline
Variety: Petrified woods here are hydrous microcrystalline variety of quartz that can be generally termed as chalcedony.Collection
Petrified Wood CollectionAcquisition
Accession
78.58Source or Donor
Delmar Smith Petrified Wood CollectionAcquisition Method
DonationOther Names and Numbers
Other Number
Other Number: 78.58.265Dimensions
Width
6 inDepth
1/4 inLength
3 inDimension Notes
Dimension taken at widest pointsLocation
Location
Display Case
PW-1Room
Petrified Wood RoomBuilding
Crater Rock MuseumCategory
ExhibitMoved By
Jillian Mather KettleyDate
January 14, 2025Notes
Inventory/Locating
