- Home
- Rocks
- Type fossils
- Fossil Specimens
- Minerals
- Glossary
- Stratigraphic Chart
- Michel-Levy Chart
- Classification of igneous rocks
- University of Cambridge
- Department of Earth Sciences
- ESC Library
- Moodle
- Sedgwick Museum
- DoITPoMS
- Mindat.org
- Microfossils
- Bryozoans
- Webmineral
- Tree of Life
- CrystalMaker
- Virtual Microscope
Browse Items (2 total)
Sort by:
TF0331 Ammonite Aptychus
Species
latus Parkinson
Stratigraphic Range
Jurassic
Taxonomy
Phylum: MolluscaClass: CephalopodaSubclass: AmmonoideaOrder: Ammonitida
Distinctive Features
Straight edgeGrowth linesCurved plate
Preservation
CalciteDisarticulated from ammonite…
Gypsum
Formula
CaSO4∙2H20
Structure
Non-silicate
Crystal System
Crystal system: monoclinic (+)
Physical Properties
Colour in hand specimen: usually white or colourlessCleavage: rhombohedral, one perfect, two distinctHardness: 2
Mineral…