Middle Permian

Middle Permian

[′mid·əl ′pər·mē·ən]
(geology)
The geologic epoch occurring between the Upper and Lower Permian, beginning approximately 260,000,000 years ago.
References in periodicals archive ?
During the Middle Permian in Abu Dhabi, the climate gradually became warmer and more arid.
During the early stage of the Middle Permian, the crustal activity was enhanced in Bogda Mountain, and in the late stage of the Middle Permian (Lucaogou and Hongyanchi formations), the study area underwent a significant transformation from an epicontinental marine basin to a lacustrine basin as a result of crustal uplift and marine regression, and Bogda Mountain became the depocenter.
A stable lacustrine basin formed in the late stage of the Middle Permian and large-scale thrust faults in the period of Himalayan orogeny are significant structural conditions for the generation and preservation of oil shale.
Sweetognathus whitei (Rhodes), lateral view, X80, middle Permian (Guadalupian)--2
Hindeodella triassica (Muller), lateral view, X80, middle Permian lower Triassic--11
Hindeodus excavatus (Behnken), lateral view, X150, middle Permian (Guadalupian)--12
They seem to have survived a major change in the terrestrial fauna that occurred during the Middle Permian, a poorly understood extinction event in the history of life on land," he said.
The third species from the Middle Permian of north European Russia was described under the name Sindomioptera soyanensis Rasnitsyn, 1977 in the family Permosialidae (order Miomoptera = Palaeomanteida).
With the exception of the Roadian stage, the shallow-water conodonts of the Middle Permian are currently considered of minor importance relative to conodont biostratigraphy because it is based on the evolution of pelagic conodonts.
crofti fauna are very different from the Mesogondolella faunas of the Middle Permian Guadalupian Series that are characterized by serrated Mesogondolella of the M.
A vertical seismic profile, biostratigraphic analysis and logs have confirmed that the well encountered approximately 1000 meters of Middle Permian carbonates in a reef-shaped structure which contained no reservoir.