Luisian Stage

Luisian Stage

      major division of Miocene rocks and time in the Pacific Coast region of North America (the Miocene Epoch began about 26,000,000 years ago and lasted about 19,000,000 years). The Luisian Stage, which precedes the Mohnian Stage and follows the Relizian Stage, was named for exposures studied in San Luis Obispo County, Calif. Three subdivisions of the Luisian Stage are recognized, based on characteristic fossil foraminiferans—single-celled organisms having calcareous shells. The Luisian Stage is approximately equivalent in age to the Helvetian Stage recognized in Europe and elsewhere.

* * *


Universalium. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • Relizian Stage — ▪ geology       major division of Miocene rocks and time on the Pacific coast of North America (the Miocene epoch began 23.7 million years ago and ended 5.3 million years ago). The Relizian Stage, which overlies the Saucesian Stage and precedes… …   Universalium

  • Langhian — is the older ICS age of the Middle Miocene epoch. It spans the time between 15.97 ± 0.05 Ma and 13.65 ± 0.05 Ma (million years ago)GeoWhen (2007)] . Defined by M. F. Pareto in 1864, it was originally based on evidence from the Langhe area north… …   Wikipedia

  • Miocene — System Series Stage Age (Ma) Quaternary Pleistocene Gelasian younger Neogene Pliocene …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”