Results 41 to 50 of about 5,414 (202)
Shiyou shiyan dizhi, 2020 The Wufeng-Longmaxi shale in the Sichuan Basin is the only stratum in China to realize commercial development of shale gas. There are some differences in shale gas generation and a lack of direct experimental evidence of the reasons for these differences.
Zhongliang MA +5 more
doaj +1 more source
Variation of Organic Pore Structure With Maceral Types in the Longmaxi Shale, Sichuan Basin
Frontiers in Earth Science, 2021 Organic matter (OM), composed of various macerals, has a strong influence on the enrichment of shale gas. Nevertheless, the connection between OM-hosted pore structure and maceral type is not yet fully understood because of the difficulty to identify the
Qian Pang +7 more
doaj +1 more source
, 2018 A recent core drilling in the geologically classical Fågelsång area resulted in a 58.70-m-long drill core through the lowermost Sandbian Sularp Shale, the Darriwilian Almelund Shale and Komstad Limestone, and part of the late Tremadocian to earliest ...
S. Bergström +4 more
semanticscholar +1 more source
A crustoid graptolite lithoimmured inside a Middle Ordovician nautiloid conch from northern Estonia
Annales Societatis Geologorum Poloniae, 2019 A light grey nautiloid conch has a dark brown colony attached to its internal surface. This colonial fossil resembles hederellids and bryozoans, but is in fact a crustoid graptolite ( Hormograptus ? sp.).
O. Vinn, Mark A. Wilson, U. Toom
semanticscholar +1 more source
The early Ludfordian leintwardinensis graptolite Event and the Gorstian–Ludfordian boundary in Bohemia (Silurian, Czech Republic) [PDF]
, 2014 P. Štorch, Š. Manda, D. Loydell
semanticscholar +2 more sources
Natural Gas Industry B, 2021 The Wufeng Formation–Longmaxi Formation in the Sichuan Basin in South China is the key stratum for shale gas exploration and production. To date, three national shale gas demonstration zones have been developed.
Haikuan Nie +5 more
doaj +1 more source
The diverse bivalved arthropods of Castle Bank (Darriwilian, Ordovician), Wales
Papers in Palaeontology, Volume 12, Issue 5, September/October 2026.Abstract The Darriwilian (Didymograptus murchisoni Biozone, Middle Ordovician) Castle Bank Lagerstätte, near Llandrindod, Wales (UK) hosts a diverse assemblage of marine animals, generally under 10 mm in size. Here we provide an overview of the diversity of bivalved arthropods from Castle Bank.
Stephen Pates +3 more
wiley +1 more source
Chapter Two – Conodont and Graptolite Biostratigraphy of the Ordovician System of Argentina
, 2016 The state of the art on conodont and graptolite biostratigraphy of the Ordovician System of Argentina is introduced. A composite biostratigraphic chart is assembled by precise ties of conodont and graptolite index species throughout the system.
G. Albanesi, G. Ortega
semanticscholar +1 more source
Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.Abstract The collisional evolution of the micro‐blocks in the northeastern Tibetan Plateau is relatively well constrained. However, the reason why a fragment of the North China Block, the Olongbuluke Block, became separated from North China by the Central Qilian Block (a fragment of the South China Block) remains unclear.
Teng Wang +4 more
wiley +1 more source
Geologica Carpathica, 2019 The mid–late Homerian Age of the Silurian Period was a time of intense changes in biota, oceanic chemistry, and sea level and is known as the lundgreni extinction (for the graptolite extinctions), the Mulde bioevent (for the conodont turnover event) or ...
Radzevičius Sigitas +4 more
doaj +1 more source