Life Science Examples
(b) Exotic terrane map, showing the suggested origin of the major terranes that make up the western Cordillera of North America. (From Prothero and Dott, 2010.)
Map shows terranes rich in limestone, shales, cherts, and faunas of the Western Cordillera of North America, including landmass formed by Euramerica, Pangea, and Gondwana.
Map shows the major terranes that is highly shredded and sheared, containing faunas, forms the Western Cordillera of North America. Cache Creek tropical faunas and East edge central Tethyan fusulinid faunas, stretches from 20 degrees North to 20 degrees South latitudes, passing through the Paleoequator. Alexander Subtropical to warm temperature faunas, terranes Stikinia and Sonomia, and the tip of Euramerica are located in the 20 degrees South latitude. Wrangellia cool faunas, East edge south Tethyan bryozoan faunas, North Cascade Range and Quesnellia terrane stretches across 40 degrees South latitude. On the East side is a single landmass formed by Euramerica, Pangea, and Gondwana. Eastern Terrane borders a part of Euramerica from 20 degrees North to 20 degrees South latitudes, passing through the Paleoequator.
Tectonic terranes of the Klamaths. (Courtesy of M.B. Miller.)
Map showing the Klamaths terranes sitting on the Mesozoic and Tertiary sedimentary rock in southern Oregon and northern California; going from east to west starting with eastern klamath of the early paleozoic to jurassic periods, central metamorphic of the devonian period, western paleozoic and triassic terranes, western jurassic terrane, mesozoic rocks on the coast, and jurassic plutons scattered throughout.
The map shows the terranes in southwestern Oregon and northern California. The major cities in Oregon are Roseburg and Medford. The major cities in California are Crescent City, Eureka, Yreka, and Redding. The Mesozoic rock of Coast Ranges, mostly Franciscan F m is along the western coast and off the coast to the east in north central California. Redwoods are in this region along the northern coast of California. The Western Jurassic terrane is a narrow strip of region to the east of the Mesozoic rock. The Western Paleozoic and Triassic terrane are a broad area to the east of the Western Jurassic terrane. A small area of the Western Jurassic terrane is in the Western Paleozoic and Triassic terrane in northern California. The Central Metamorphic terrane in the Devonian period is in the southern part of the Western Paleozoic and Triassic terrane in north central California. The Eastern Klamath terrane between early Paleozoic to Jurassic is a broad area in north central California to the east of the Western Paleozoic and Triassic terrane. The Jurassic plutons are scattered in the Western Jurassic terrane, the Western Paleozoic and Triassic terrane, the Central Metamorphic terrane, and the Eastern Klamath terrane. The Mesozoic and Tertiary sedimentary rock, which postdates accretion of Klamath terranes are in the remaining region surrounding the other terranes.
Cross sections of fossil corals from the McCloud Limestone. (Photo by C. Stevens.)
A collage of several cross-sectional diagrams of fossilized corals, preserved on the McCloud Limestone. The structure of the fossil coral resembles a flowery pattern.