Name/Title
Petrified WoodEntry/Object ID
05.58.195Description
Assemblage Zone: silicified sandstone
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Family: Cyatheales
Genus: Tieta
Species: Singularis
Common Name: Tree Fern
Age: Early Permian
Location data: Pedra de Fago Formation, Araguaina, Brazil, South American
Description: Polished face shows colors of tan, pink, brown and beige
Type of Fossils Present: Plants
Fracture: conchoidal
Grain Size: Fine
Hardness: 7 Quartz
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 related volcanic mudflow. The organic material in the wood is then replaced by silica (SiO2), 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
Streak: white
Temperature: Low
Texture: Microcrystalline
Variety: Petrified woods here are hydrous microcrystalline variety of quartz that can be generally termed as chalcedony.Collection
Petrified Wood CollectionAcquisition
Accession
05.58Source or Donor
Petrified Wood CollectionAcquisition Method
DonationOther Names and Numbers
Other Number
Other Number: 2005.58.195Dimensions
Width
6-1/2 inDepth
1/4 inLength
7 inDimension Notes
Dimension taken at widest pointsLocation
Location
Shelf
3rd right center, 3rd right centerWall
right - southRoom
Wood roomBuilding
Mentzer Hall - Petrified Wood RoomCategory
PermanentMoved By
Catherine BoydDate
March 6, 2008Location
Container
RightDrawer
2nd ShelfShelf
LeftCabinet
Case #102Wall
East WallRoom
Wood roomBuilding
Mentzer Hall - Petrified Wood RoomCategory
Permanent
