Spruce

Object/Artifact

-

Crater Rock Museum

Name/Title

Spruce

Entry/Object ID

78.58.182

Description

Assemblage Zone: tropical, subtropical Chemical Composition: Si O2 Crystal System: Hexagonal Description: Family: Pinaceae Genus: Picea Common Name: Spruce (Meta-Sequoia) Age: Mid Miocene Location data: Hubbard Basin, Nevada Formation: Jarbridge Rhyolite Description: According to Delmar Smith this specimen is a thick slice of petrified wood. Piece ius barely polished on one side, and well polished on the other. Colors are unstructured patterns with whites, greys, beiges, black, brown, mustard,reds and pink. Several open holes are seen containing crystals. A band is seen running from the center outward (Inwhite, grey, and mustard). Piece contains open crystalline sections. Size:9.500"x 9.500"x .750" Type of Fossils Present: Plants Fracture: conchoidal Grain Size: Fine Hardness: 7 Quartz Lithofacies: Sedimentary 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: 78.58.182

Dimensions

Width

9-1/2 in

Depth

3/4 in

Length

9-1/2 in

Dimension Notes

Dimensions taken at widest points

Location

Location

Container

Center

Drawer

Bottom

Shelf

Left

Cabinet

case #109

Wall

West Wall

Building

Mentzer Hall - Petrified Wood Room

Category

Permanent