LIAS Meaning and
Definition
-
Lias is a term used in geology to refer to a division or stage within the Jurassic period, a geological time period that occurred between approximately 201 million and 145 million years ago. It represents one of the three major divisions of the Jurassic, the other two being the Hettangian and the Toarcian.
The term Lias was originally derived from the village of Lyme Regis in England, where the rock strata of this Jurassic stage were well-exposed and studied extensively. The Lias is characterized by its distinctive sedimentary rock formations, primarily consisting of clays, limestones, and shales. Fossil records within the Lias provide valuable insights into the flora and fauna that thrived during this period, including various marine invertebrates, fish, and reptiles.
The Lias stage is divided into several sub-stages or zones based on the presence of specific ammonite species, which are useful indicators for stratigraphic correlation and age determination. Some notable ammonite genera found within the Lias include Dactylioceras, Echioceras, and Harpoceras.
Overall, the Lias represents an important time period in the Earth's history, particularly for paleontologists and geologists interested in understanding ancient ecosystems and the evolutionary trends of marine life during the Jurassic period.
-
A term originally applied to the thin-bedded limestone's occurring at the base of the oolitic system; in geol., that group or series of strata which in England immediately overlies the Trias or Upper New Red Sandstone; hydraulic cement made from calcareous nodules and bands of the lias strata.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
Common Misspellings for LIAS
- plias
- liaws
- liqas
- liaqs
- liaas
- liasz
- liaxs
- liasx
- liaes
- liasw
- llias
- liias
- Liis
- Lia3
- Liaq
- l ias
- li as
- lia s
Etymology of LIAS
The word "Lias" comes from the name of a geological formation known as the "Lower Lias". The term "Lias" originated from the old English word "leyes" or "leys" meaning quarries or cliffs. It refers to the distinctive limestone cliffs that are typical of the Lower Lias formation. The Lower Lias is a series of marine sedimentary rocks that dates back to the Early Jurassic period, approximately 200 million years ago. The name "Lias" has been used since the 19th century to categorize and refer to this specific group of rocks in geological studies.
Infographic
Add the infographic to your website:
