stratigraphic unit
C1098
concept
A stratigraphic unit is a volume of rock or sediment defined and distinguished from adjacent material by its recognizable and mappable physical, chemical, or paleontological characteristics and its position in the geological record.
Observed surface forms (15)
- chronostratigraphic unit ×6
- sedimentary rock formation ×2
- sedimentary rock unit ×2
- Cretaceous stratigraphic unit ×1
- chronostratigraphic boundary ×1
- crystalline limestone ×1
- epoch of the Quaternary Period ×1
- fossiliferous stratigraphic unit ×1
- geologic supergroup ×1
- geological layer ×1
- lithostratigraphic unit ×1
- mass extinction boundary ×1
- metamorphic rock sequence ×1
- sedimentary rock sequence ×1
- subdivision of the Devonian Period ×1
Instances (23)
- Cretaceous
- Holocene via concept surface "epoch of the Quaternary Period"
- Earth lithosphere via concept surface "geological layer"
- Early Devonian via concept surface "subdivision of the Devonian Period"
- Dalradian Supergroup via concept surface "geologic supergroup"
- Triassic via concept surface "chronostratigraphic unit"
- Holston Formation
- Old Red Sandstone via concept surface "sedimentary rock sequence"
- Neogene via concept surface "chronostratigraphic unit"
- Pliocene epoch via concept surface "chronostratigraphic unit"
- Morrison Formation via concept surface "sedimentary rock formation"
- Oxford Clay via concept surface "sedimentary rock formation"
- Jurassic via concept surface "chronostratigraphic unit"
- Tennessee marble via concept surface "crystalline limestone"
- Cretaceous–Paleogene boundary via concept surface "chronostratigraphic boundary"
- Southern England Chalk Formation via concept surface "Cretaceous stratigraphic unit"
- Hell Creek Formation via concept surface "sedimentary rock unit"
- Cambrian Period
- Paleogene via concept surface "chronostratigraphic unit"
- Devonian Period
- Permian Period
- Millstone Grit via concept surface "sedimentary rock unit"
- Meghalayan via concept surface "chronostratigraphic unit"