Sycamore

Object/Artifact

-

Crater Rock Museum

Name/Title

Sycamore

Entry/Object ID

07.58.54

Description

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 chalcedony

Collection

Petrified Wood Collection

Acquisition

Accession

07.58

Source or Donor

Petrified Wood Collection

Acquisition Method

Donation

Other Names and Numbers

Other Number

Other Number: 2007.58.54

Dimensions

Width

4-1/2 in

Depth

3-1/2 in

Length

4-1/2 in

Dimension Notes

Dimension taken at widest points

Location

Location

Shelf

3rd center right sid, 3rd center right sid

Wall

right - south

Room

Wood room

Building

Mentzer Hall - Petrified Wood Room

Category

Permanent

Moved By

Catherine Boyd

Date

March 6, 2008

Location

Shelf

2nd right, 2nd right

Wall

right - south

Room

Wood room

Building

Mentzer Hall - Petrified Wood Room

Category

Permanent

Moved By

Catherine Boyd

Date

March 6, 2008

Location

Container

Right

Drawer

2nd Shelf

Shelf

Right

Cabinet

Case #101

Wall

South wall

Building

Mentzer Hall - Petrified Wood Room

Category

Permanent