Name/Title
Bald CypressEntry/Object ID
07.58.71Description
Assemblage Zone: Sedimentary
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Family: Taxodiaceae
Genus: Taxodium
Common Name: Bald Cypress
Age: Mid-Miocene
Location data: Rattlesnake Ridge, Washington
Description: Large stump (log) with a cut and polished face. Outer bark area has yellows, whites, browns and reddish -browns covering it. The face has a white and bluish-grey translucent pearlessence look, with some growth rings visible.
Size: 9.00"x 9.500"x 13.00"
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 CollectionAcquisition
Accession
07.58Source or Donor
Petrified Wood CollectionAcquisition Method
DonationOther Names and Numbers
Other Number
Other Number: 07.5.71Dimensions
Width
9-1/2 inDepth
13 inLength
9 inDimension Notes
Dimension taken at widest pointsLocation
Location
Shelf
PW-3-ARoom
Petrified Wood RoomBuilding
Crater Rock MuseumCategory
ExhibitMoved By
Jillian Mather KettleyDate
August 2, 2025Notes
Location added when performing inventory
