Zobrazeno 1 - 10
of 4 770
pro vyhledávání: '"Early Cretaceous"'
Autor:
Alexey V. Vergunov, Andrey A. Novoselov, Elena S. Deeva, Sofia S. Shadrina, Bakhtiyar K. Kenesbayev
Publikováno v:
Известия Томского политехнического университета: Инжиниринг георесурсов, Vol 335, Iss 11 (2024)
Relevance. The necessity to assess the role of altered volcanic ash on the formation of mineral and geochemical characteristics of coal-bearing deposits. Traces of volcanic material in coals are diagnosed mainly in the form of clay horizons – tonst
Externí odkaz:
https://doaj.org/article/1b849f1138f54b8baf809fa50c27330e
Autor:
Alita Maria Neves Ribeiro, Yong Yang, Antônio Álamo Feitosa Saraiva, Renan Alfredo Machado Bantim, João Tavares Calixto Junior, Flaviana Jorge de Lima
Publikováno v:
Plant Diversity, Vol 46, Iss 3, Pp 362-371 (2024)
Ephedroid macrofossils have been widely documented in Cretaceous deposits, including numerous from the Lower Cretaceous Yixian Formation of NE China. However, few ephedroid macrofossils have been reported from South America. Herein, we describe a new
Externí odkaz:
https://doaj.org/article/812f127bf08d4481a967c96bfc801f9c
Publikováno v:
Georesursy, Vol 23, Iss 3, Pp 118-131 (2024)
Paleontological remains from the Bazhenovo Horizon of Western Siberia (Tithonian–Berriasian) are represented by macro- and microfossils. The Horizon had a marine genesis and the basis of ecosystem of this paleobasin composed of pelagic organisms-pr
Externí odkaz:
https://doaj.org/article/df9fdcbf04eb44cca8fa7c68765c5cc0
Publikováno v:
The Depositional Record, Vol 10, Iss 1, Pp 4-32 (2024)
Abstract There has been no consensus yet regarding the precise initial timing and duration of the late Mesozoic extensional tectonics in the South‐eastern China Block. This work focusses on the growth strata of the Early Cretaceous red beds in the
Externí odkaz:
https://doaj.org/article/4448c2be348e411d9fdef9248b598f6e
Publikováno v:
Dizhi lixue xuebao, Vol 30, Iss 3, Pp 377-393 (2023)
Objective The Beishan Range occupies a key position in Central Asia. This study aims to deepen the understanding of the timing, intracontinental deformation processes, and their dynamic mechanisms in the Late Mesozoic on the southern margin of the Ce
Externí odkaz:
https://doaj.org/article/ffc205c0edb84f27952353fbdd5627a2
Autor:
Jussi Hovikoski, Jon R. Ineson, Mette Olivarius, Jørgen A. Bojesen-Koefoed, Stefan Piasecki, Peter Alsen
Publikováno v:
GEUS Bulletin, Vol 55, Pp 1-20 (2023)
Two drill cores spanning the Upper Jurassic – Lower Cretaceous succession in Wollaston Forland, North-East Greenland, offer an insight into mud accumulation in an evolving distal fault block. Previous studies have revealed the presence of long-last
Externí odkaz:
https://doaj.org/article/58b75f2b597b45c69444843e80dca71e
Publikováno v:
Frontiers in Earth Science, Vol 12 (2024)
The Moganshan Volcanic Basin is located in the northeastern section of the Ganhang volcanic-tectonic-uranium polymetallic metallogenic belt. To explore the uranium mineralization potential of these volcanic rocks, petrographic, elemental geochemical,
Externí odkaz:
https://doaj.org/article/7cbd0b3fae3d41d99f91ae371a40b62b
Publikováno v:
Frontiers in Earth Science, Vol 12 (2024)
A dominantly NW-SE directed extensional tectonics in the Early Cretaceous significantly reworked the Late Permian-Triassic orogenic framework of the Dabie orogenic belt. The North Dabie complex (NDC) is the principal domain recording this tectonic ev
Externí odkaz:
https://doaj.org/article/1b4f89b333be482f8776f6f0df7354a7
Autor:
Gar W. Rothwell, Ruth A. Stockey
Publikováno v:
Acta Palaeobotanica, Vol 63, Iss 2, Pp 119-128 (2023)
Anatomically preserved lycophytes of the Lycopodiales and Selaginellales have been discovered among a diverse assemblage of plants and fungi in carbonate marine concretions at the Apple Bay locality along the shore of Holbert Inlet near the northern
Externí odkaz:
https://doaj.org/article/cd25c4f707974d50a96825cbf3569ede