Sequoia

Object/Artifact

-

Crater Rock Museum

Name/Title

Sequoia

Entry/Object ID

05.58.221(a)

Description

Chemical Composition: Si O2 Crystal System: Hexagonal Description: Family: Taxodiaceae Genus: Meta-sequoia Common Name: Redwood Age: Mid-Miocene Location data: Ellensburg, Washington Description: Thick slab with polished face and rounded back. Dark and light greys on outer areas with dull yellows on the inner areas. Growth rings are visible. Type of Fossils Present: Plants Fracture: conchoidal Grain Size: Fine Hardness: 7 Quartz Luster: Glassy Occurrence: Like petrified wood, limb cast are created in much the same manner. Volcanic ash or silica-rich sediment buries a tree limb, the limb decays, leaving behind an open void. This void works as a mold that fills with amorphous silica that has percolated through the surrounding rock. Once microamorphous silica has filled the mold and the crystallization process to a (quartz)chalcedony or opal is complete, the result is a siliceous rock with the same exterior markings as the original limb. Pressure: Low-Moderate Rock Color: Dark Rock Origin: Post-depositional Rock Type: Sedimentary Specific Gravity: 2.6 Surface Process: Not apparent Temperature: Low Texture: Microcrystalline Variety: Petrified woods ar hydrous microcrystalline varieties of quartz that can be generally termed as chalcedony or opalized .

Collection

Petrified Wood Collection

Acquisition

Accession

05.58

Source or Donor

Petrified Wood Collection

Acquisition Method

Donation

Other Names and Numbers

Other Number

Other Number: 05.58.221(a)

Dimensions

Width

10-1/2 in

Depth

3/4 in

Length

17 in

Dimension Notes

Dimension taken at widest points

Location

Location

Room

Curation Storage

Building

Crater Rock Museum

Date

August 5, 2025

Location

Drawer

Right

Shelf

Bottom

Cabinet

Case #110(a)

Wall

West

Building

Mentzer Hall - Petrified Wood Room

Category

Permanent