1-20 OF 23 RESULTS FOR

Verdun Formation

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Published: 01 June 2015
Journal of Sedimentary Research (2015) 85 (6): 646-659.
... with Eocene forearc deposition, and syndepositional DZ is used to revise maximum depositional age for the upper Eocene Helico Member and Verdun Formation. Progressive subsidence and arc shut-down in the late Eocene coincide with arc collision to the north, uplift of the Amotape block, subduction erosion...
FIGURES | View All (4)
Series: Reviews in Economic Geology
Published: 01 January 2001
DOI: 10.5382/Rev.14.05
EISBN: 9781629490212
... of events leading to the formation or deformation of gold deposits. This analysis is essential for the determination of controls on mineralization and ore-forming processes, and for the prediction of the geometry and plunges of deposits and orebodies. Many greenstone gold districts have experienced a common...
FIGURES | View All (31)
Journal Article
Published: 01 August 2004
The Canadian Mineralogist (2004) 42 (4): 1139-1158.
... of the apatite grains, contribute to an undesirable behavior of the apatite ore, once submitted to processes of industrial concentration. The types of apatite and the processes of their formation here defined and established for the Catalão I alkaline-carbonatitic complex are quite common and widely distributed...
FIGURES | View All (5)
Journal Article
Journal: Paleobiology
Published: 01 January 2005
Paleobiology (2005) 31 (3): 503-521.
.... At the same time, protective skeleton originated in animals living above the sediment surface. Apparently, the diversification of predators in the earliest Cambrian forced other animals to invest energy either in digging or in a protective armor (“the Verdun Syndrome”). True mud-eaters appeared later...
FIGURES | View All (8)
Series: SEPM Special Publication
Published: 01 January 2009
DOI: 10.2110/sepmsp.093.287
EISBN: 9781565762978
... • The Mogollon Formation was studied from seven wells (105 samples). • The Talara Group was studied from two wells, one from the Negritos field (63 samples) and one from the Carpitas field (36 samples). Abstract The Talara Basin in northwestern Peru includes two Paleogene...
FIGURES
Series: Geological Society, London, Special Publications
Published: 01 January 2009
DOI: 10.1144/SP326.16
EISBN: 9781862395749
... Plata Craton, Argentina) the La Villa Monica Formation has a wide distribution, but it crops out over a limited area. It comprises laminated limestones, biostromes and bioherms dated with Rb/Sr as 793±32 Ma ( Cingolani & Bonhomme 1988 ). The Mina Verdún Group ( Poiré et al . 2003 ) crops out over...
FIGURES | View All (11)
Journal Article
Journal: PALAIOS
Published: 01 February 2011
PALAIOS (2011) 26 (2): 99-105.
..., having a flattened floor in tunnels and rounded floor in the chambers ( Figs. 4B , 5 ). Absence of such a median ridge was also recorded by Hasiotis et al. (2004) in some burrows from the Lower Triassic Fremouw Formation of Antarctica and by Groenewald et al. (2001) in burrows from the Early...
FIGURES | View All (6)
Journal Article
Journal: Paleobiology
Published: 01 January 2015
Paleobiology (2015) 41 (1): 187-201.
... of Astarte were collected at the Miste locality near Winterswijk, Gelderland province, the eastern Netherlands (Janssen 1984 ), from middle Miocene (“Hemmoorian”) sediments assigned to the Miste Bed, Aalten Member, Breda Formation (Van den Bosch et al. 1975). More specifically, specimens...
FIGURES | View All (6)
Journal Article
Published: 01 August 2011
Quarterly Journal of Engineering Geology and Hydrogeology (2011) 44 (3): 293-306.
..., two primary colours are shown, red and greenish blue, both with differing shades of intensity. The redder the formation as indicated on the map, the drier its classification for dug-out purposes, the bluer, the wetter. Three ‘good’ units are grouped to the left of the key, three intermediate (‘fair...
FIGURES | View All (5)
Journal Article
Journal: Geophysics
Published: 01 January 2002
Geophysics (2002) 67 (6): 1729-1739.
... ). Magnetic properties of soils and weathered surficial formations can be significantly different from those of the parent rock. This fact, observed 50 years ago ( Leborgne, 1955 ; Cook and Carts, 1962 ), was at the origin of significant developments in both archaeological prospecting ( Aitken et al., 1958...
FIGURES | View All (15)
Journal Article
Journal: AAPG Bulletin
Published: 01 November 2005
AAPG Bulletin (2005) 89 (11): 1519-1545.
... horizons and are illustrated on the simplified stratigraphic column of Figure 2 (Petrobras Energia S.A., 2001, personal communication; Higley, 2004 ). The Redondo Formation has been penetrated by some wells in Block X, and Perez Companc (now Petrobras Energia S.A.) made four cuttings available...
FIGURES | View All (14)
Journal Article
Journal: PALAIOS
Published: 01 September 2010
PALAIOS (2010) 25 (9): 565-575.
...-through sole preservation occurs on beds in both the Rawnsley Quartzite ( Fedonkin and Vickers-Rich, 2007 , fig. 400) and in the Ust'Pinega Formation, where the most notable examples have globular indentations preserved at the distal tips ( Fig. 2F ; Fedonkin 2003 , fig. 15) or middle of the paired...
FIGURES | View All (6)
Journal Article
Published: 01 March 2007
Journal of Paleontology (2007) 81 (2): 331-351.
... of Cristispira in southern Peru. Specimens occur abundantly at Bajada del Diablo (DV 1442-1) and east of that valley (DV 1323-1) in near-basal sandstones of the Otuma Formation. Some mollusks found with C. cochleiformis suggest a Late Eocene age based on their occurrence in the Chira-Verdun sequence...
FIGURES | View All (9)
Series: Geological Society, London, Special Publications
Published: 01 January 2010
DOI: 10.1144/SP343.20
EISBN: 9781862395916
.... In 1916 he was enrolled in the army and fought at the battle of Verdun. He was injured in May 1918 during a poison gas attack and was hospitalized until March 1919. He then abandoned his medical vocation and turned studies in geology in Rennes, where he became the assistant of geologist Fernand Kerforne...
FIGURES | View All (11)
Journal Article
Journal: Geology
Published: 01 August 2010
Geology (2010) 38 (8): 711-714.
... , Lower Cambrian trace fossils from the Buen Formation of central North Greenland: Preliminary observations : Rapport Grønlands Geologiske Undersøgelse , v. 148 , p. 93 – 100 . Buatois L.A. Mángano M.G. , 1993 , The ichnotaxonomic status of Plangtichnus and Treptichnus : Ichnos , v...
FIGURES
Journal Article
Published: 01 January 2006
Micropaleontology (2006) 52 (2): 97-150.
... similar to ours were those from the Soldado formation, Trinidad (Eocene, Midway) ( Cushman and Renz 1942 ) (CC 38213, 38270). Occurrence: Anomalinoides acutus is very rare in the lowermost samples of the lower part of the Fortuna section, and very rare to common in the rest of the section. Description...
FIGURES | View All (14)
Journal Article
Published: 01 March 2014
Journal of Paleontology (2014) 88 (2): 284-298.
... of clay ( Gehling, 1986 , 1999 ; Fedonkin, 1992 ; Gehling and Droser, 2009 ). Bacterial decay and formation of a mineral “death-mask” over the sand-smothered animals and biomats, proposed as the mechanism for the preservation of microbial textures and body-fossil impressions ( Gehling, 1999 ), has been...
FIGURES | View All (9)
Series: AAPG Memoir
Published: 01 January 2014
DOI: 10.1306/13441852M1053605
EISBN: 9781629812670
...). Subsequent stages of larger size proppant (varying composition) typically continue to “backfill” the previous fracture sets while adding additional complexity near the wellbore. Frac’s tend to grow upward into the Lower Bossier Formation. Gel treatments appear to excite more microseismic energy...
FIGURES | View All (16)
Series: Geological Society Special Publication
Published: 01 January 2011
DOI: 10.1144/SP354.14
EISBN: 9781862396029
..., or frost shattering, is a complicated process dominated by ice formation and bedrock properties. The role of ice segregation in bedrock weathering is discussed by Hallet et al. (1991) while Matsuoka (1991) and Matsuoka et al. (1997) discuss the integral effect of a number of factors. Hall (1999...
FIGURES | View All (8)
Journal Article
Journal: Paleobiology
Published: 01 January 2015
Paleobiology (2015) 41 (1): 1-15.
... modification are genes associated with regional patterning of the developing embryo, for example involved in formation of the endomesoderm (gut), heart, etc. Davidson and his colleagues have intensively reconstructed the dGRN of the developing sea urchin embryo and identified a core...