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Herreria Formation

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Stratigraphic column of the upper part of the La <b>Herrería</b> <b>Formation</b>, at a l...
Published: 10 June 2015
Figure 3. Stratigraphic column of the upper part of the La Herrería Formation, at a lower interval of the Los Barrios de Luna 1 (BL1) section (province of León, northern Spain).
Journal Article
Published: 10 June 2015
Geological Magazine (2015) 152 (6): 1123-1136.
...Figure 3. Stratigraphic column of the upper part of the La Herrería Formation, at a lower interval of the Los Barrios de Luna 1 (BL1) section (province of León, northern Spain). ...
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Journal Article
Journal: AAPG Bulletin
Published: 01 April 1962
AAPG Bulletin (1962) 46 (4): 425-456.
... Limestone is its oldest late Tertiary formation. Following late Miocene uplift, clastics of the Pliocene(?) Herrería and Armas Formations were laid down. The Río Dulce has a thickness in excess of 1,000 meters, the Herrería 240 meters, and the Armas 2,500 meters. The seas withdrew at the end of the Pliocene...
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Journal Article
Journal: Economic Geology
Published: 01 January 2008
Economic Geology (2008) 103 (1): 185-214.
... position as Tharsis. The shale stratigraphically below the massive sulfides has a chemical composition mainly consistent with its formation in oxic to suboxic conditions and is characterized by low Mo contents (<50 ppm), low V/Cr ratios (<2), and high Fe but variable Mn contents. Shale directly...
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Journal Article
Published: 12 February 2010
Geological Magazine (2010) 147 (5): 690-703.
... Lower Cambrian redlichids, which typically have a granular or punctate surface. Among Lower Cambrian trilobites from Spain, comparison can be made with Lunolenus lunae from the upper part of the Herrería Formation ( Fig. 9 d). However, L. lunae has a more prominent parafrontal band and plectrum...
Journal Article
Journal: GSA Bulletin
Published: 16 May 2017
GSA Bulletin (2017) 129 (11-12): 1585-1601.
... different age spectra at the top and base of the Herrería Formation, Spain. Age peaks present in some spectra are missing in others, indicating that if only one sample had been selected for provenance analysis in either study, specific zircon sources would have been excluded. Detrital-zircon studies...
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Journal Article
Journal: Geology
Published: 15 October 2019
Geology (2019)
..., and petrographic and geochemical data collection, which aimed to reconstruct the geological history leading to the formation of this geode. The geode is hosted in mineralized Triassic carbonate rocks with a discontinuous mineral sequence from iron-carbonates and barite to celestine and finally gypsum...
Journal Article
Journal: AAPG Bulletin
Published: 01 April 1963
AAPG Bulletin (1963) 47 (4): 696-698.
.... Herreria Formation ( Vinson, 1962 , p. 542) One sample (Walpole 96) has been given the same coordinates as the type locality (N 15° 49′, W 88° 44′). The fauna of this sample is identical with that of the majority of samples from the Rio Dulce Formation, notwithstanding the pronounced lithologic difference...
Series: Geological Society, London, Special Publications
Published: 01 January 2002
DOI: 10.1144/GSL.SP.2002.204.01.11
EISBN: 9781862394520
... thrusting and left-lateral transcurrent motion of crustal blocks and formation of a variety of ore deposits in both terranes. Most of the mineralization is related to dilational openings within thrusts and shear zones, extensional faults and pull-apart basins. A discontinuous diachronous vertical section...
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Journal Article
Journal: AAPG Bulletin
Published: 01 June 1993
AAPG Bulletin (1993) 77 (6): 1041-1063.
... with a major component of extension, took place during the Paleocene, producing a series of southwest-northeast–trending en echelon normal faults, which created a topographic relief of ridges and troughs. Both the types of structures and their timing of formation are consistent with models that propose...
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Journal Article
Published: 01 February 2009
Clays and Clay Minerals (2009) 57 (1): 1-24.
... alteration around areas of silicification. In the latter, native gold appears associated with interstratified illite-smectite, suggesting a relatively low-temperature formation. Hot, low-pH fluids are responsible for this mineralization and alteration assemblage. The present study contributes to epithermal...
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Series: Geological Society, London, Special Publications
Published: 01 January 2014
DOI: 10.1144/SP394.5
EISBN: 9781862396708
... dykes outcrop in the CFZ, including two that are some 500 m wide. To the NW of the CFZ the oldest post-orogenic rocks are Serravallian/Tortonian marine marls and sands of the Saltador Formation (Fig. 3 ). These are preserved from erosion in tight synformal inliers in the basement rocks. In the CFZ...
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Series: Geological Society, London, Special Publications
Published: 01 January 2009
DOI: 10.1144/SP328.10
EISBN: 9781862395763
..., tan and cream-coloured limestone unconformable on Permian, Cretaceous and Eocene rocks. The type locality of the formation is just above sea level along Río Dulce, upstream from the Town of Livingston, Izabal. The Río Dulce Formation is overlain by the Herrería Formation of Pliocene (?) age, following...
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Journal Article
Published: 30 May 2017
Geological Magazine (2018) 155 (7): 1465-1474.
... a relatively rich small shelly fossil assemblage. Álvaro et al. ( 2010 , fig. 2; 2015 , fig. 2), contrary to their previous opinion (Álvaro & Blanc-Valleron, 2002 ; Álvaro et al. 2008 ), correlated the Codos formation with other phosphorite-rich units of Spain (Herrería Formation, lower member...
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Journal Article
Journal: Geology
Published: 01 January 2010
Geology (2010) 38 (1): 51-54.
... deposits increasing to about one-third of all fluvial successions from the start of the Devonian. Because tidal channels also commonly accrete laterally, the case studies and field sites were scrutinized carefully to exclude them. “Meandering fluvial” deposits inferred from the Cambrian Herrería Formation...
FIGURES
Journal Article
Published: 08 April 2016
Journal of the Geological Society (2016) 173 (4): 603-615.
... age (<553 Ma). Therefore, it is unknown whether a shallow or a deep environment was present in the Cantabrian Zone in the latest Ediacaran times . In the Cantabrian Zone and Iberian Ranges, the basal detrital successions of the Herrería group and Bámbola formation ( Fig. 2 ) were respectively...
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Series: Geological Society, London, Geology of Series
Published: 01 January 2002
DOI: 10.1144/GOSPP.3
EISBN: 9781862393912
... in Figure 3.2 . In northern Spain (Cantabrian region) the Lower Cambrian Herrería Formation (Fm) lies unconformably upon the Pre-cambrian Narcea Group (Gp) (Chapter 2 ), from which organic-walled microfossils ( Palaeogomphosphaera cauriensis and Sphaerocongregus variabilis ) have been obtained...
FIGURES
Series: Geological Society, London, Geology of Series
Published: 01 January 2002
DOI: 10.1144/GOSPP.19
EISBN: 9781862393912
... by a reef barrier. Two productive potash layers are located in the Saline Member (Mb) of the Cardona Fm (upper Eocene), with thicknesses of 3.5 m (lower) and 0.8 m (upper). Anhydrite, very pure halite layers and marls are also common lithologies of this formation. The internal structure of the basin...
Journal Article
Journal: GSA Bulletin
Published: 01 May 2014
GSA Bulletin (2014) 126 (5-6): 702-719.
... of clastic sediments of Amazonian provenance ( Barr et al., 2003 ; Friedl et al., 2000 ; Keppie et al., 1998 ). Detrital micas from the Cambrian Candána-Herrería Sandstones of zone 1 (same formation and locality as anomalous Zr sample OD-1; Fernández-Suárez et al., 2013 ) that yield 1.58–1.78 Ga Ar-Ar...
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Series: Geological Society, London, Geology of Series
Published: 01 January 2002
DOI: 10.1144/GOSPP.2
EISBN: 9781862393912
..., stratigraphic and sedimentological studies have not advanced significantly in the last two or three decades. This is the case in northern Spain, where the Precambrian successions are known as the Narcea schists ( Lotze 1956 a ) or Mora Formation (Fm) (Compte 1959) in the Narcea antiform (Fig. 2.1c...