Name/Title
Coniferous Seed ConesEntry/Object ID
05.58.255Description
Assemblage Zone: mudstone & sandstone
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Genus: Sequoia
Species: Dakotensis
Common name: Siderite cast of Coniferous Seed Cones
Age: Cretaceous
Location data: Cannonball formation
Description: 7 small siderite cast coniferous seed cones color is a reddish-rusty brown.
Type of Fossils Present: Plants
Fracture: conchoidal
Grain Size: Fine
Hardness: 7 Quartz
Lithofacies: Marine sediments
Luster: Glassy
Occurrence: In some cases the original remains of the organism have been completely dissolved or otherwise destroyed. When all that is left is an organism-shaped hole in the rock, it is called an external mold. If this hole is later filled with other minerals, it is a cast. An internal mold is formed when sediments or minerals fill the internal cavity of an organism, such as the inside of a bivalve or snail.
Pressure: Moderate
Rock Color: Medium
Rock Origin: Post-depositional
Rock Type: Sedimentary
Specific Gravity: 2.6
Surface Process: Not apparent
Temperature: Low to moderate
Texture: Microcrystalline
Variety: The coniferous seed cones have been cast in siderite which is an Iron CarbonateCollection
Petrified Wood CollectionAcquisition
Accession
05.58Source or Donor
Petrified Wood CollectionAcquisition Method
DonationOther Names and Numbers
Other Number
Other Number: 2005.58.255Dimensions
Dimension Notes
Dimension taken at widest pointsLocation
Location
Container
RightDrawer
3rd ShelfShelf
LeftCabinet
Case #104Wall
East WallBuilding
Mentzer Hall - Petrified Wood RoomCategory
Permanent
