Palm

Object/Artifact

-

Crater Rock Museum

Name/Title

Palm

Entry/Object ID

78.58.374

Description

Assemblage Zone: sedimentary Chemical Composition: Si O2 Crystal System: Hexagonal Description: Family: Palmae Genus: Palmoxylon Common Name: Palm Age: Oligocene Location data: Long Butte, Eagle Point, Jackson County, Oregon, USA Roxy Ann Formation, Description: A 5/8" thick slice of a petrified palm stump from Roxy Ann in Jackson County Oregon. Polished side shows a center of white and grey agate going out to browns and blacks with the outer matrix is tan and porous. Size: 7.750"x 6.875"x .500" Type of Fossils Present: Plants Fracture: conchoidal Grain Size: Fine Hardness: 7 Quartz Lithofacies: Tropical to subtropical 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 Collection

Acquisition

Accession

78.58

Source or Donor

Delmar Smith Petrified Wood Collection

Acquisition Method

Donation

Other Names and Numbers

Other Number

Other Number: 1978.58.374

Dimensions

Width

6-7/8 in

Depth

1/2 in

Length

7-3/4 in

Dimension Notes

Dimensions taken at widest points

Location

Location

Container

Right

Drawer

3rd Shelf

Shelf

Right

Cabinet

Case #107

Wall

North Wall

Building

Mentzer Hall - Petrified Wood Room

Category

Permanent