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Micula

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Journal Article
Journal: Geology
Published: 01 March 2010
Geology (2010) 38 (3): 203-206.
...Nicolas Thibault; Silvia Gardin; Bruno Galbrun Abstract Micula murus is one of the main calcareous nannofossil biostratigrapic markers of Tethyan and Intermediate provinces in the upper Maastrichtian (uppermost Cretaceous). A review of its first occurrence at 14 deep-sea sites and sections shows...
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Journal Article
Published: 01 July 1979
Micropaleontology (1979) 25 (3): 272-280.
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Age ranges calculated from biomagnetostratigraphic records of  <b>Micula</b> murus...
in > Geology
Published: 01 March 2010
Figure 2. Age ranges calculated from biomagnetostratigraphic records of Micula murus . Thick gray dotted lines show two sets of sites: (1) age range of first appearance of M . murus in the Tropical Realm of Atlantic and Pacific Oceans and subtropical latitudes of the North Atlantic. (2) Age
Series: Geological Society, London, Special Publications
Published: 01 January 2001
DOI: 10.1144/GSL.SP.2001.183.01.05
EISBN: 9781862394315
... Coastal Plain sediments and the lower to upper bathyal Blake Nose sediments. Micula murus , a reliable marker species for low- to mid-latitude sites, is shown herein to respond to differing palaeoenvironmental conditions of nearshore v. open-ocean sites. Its usefulness as a biostratigraphic marker...
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Journal Article
Published: 01 January 2002
Micropaleontology (2002) 48 (1): 31-52.
...- to shallow-water transect along the eastern United States Atlantic margin document that the first occurrence of Micula murus (Martini 1961) Bukry 1973 is diachronous, appearing 2.0 million years earlier in open ocean sites than in shallow marine sites. The first occurrence (FO) of Lithraphidites kennethii...
Series: SEPM Special Publication
Published: 01 January 2009
DOI: 10.2110/sepmsp.091.121
EISBN: 9781565762961
.... The semiquantitative investigations focused on six taxonomic groups, such as Watznaueria barnesae, Micula spp., Boreal nannofossils, Tethyan nannofossils, Braarudosphaera bigelowii, and the calcareous dinoflagellate genus Thoracosphaera. The new data indicate constant δ 13 C values in the Upper Campanian...
Journal Article
Published: 01 October 2005
Micropaleontology (2005) 51 (4): 333-343.
....), and introduce the taxon Micula as a potential fertility proxy, by virtue of its high abundance in particular environments. Further to this, we outline a program that is in progress, involving geochemical ‘finger-printing’ of individual taxa combined with nannofossil statistical data, that should enable us...
Journal Article
Published: 26 January 2001
Canadian Journal of Earth Sciences (2001) 38 (2): 229-238.
... by up to 6 m of pelagic marls. The marls are of latest Maastrichtian age ( Plummerita hantkeninoides (CF1) Zone, Micula prinsii Zone) and deposited under normal pelagic conditions with no significant evidence of reworking or slumping. Original deposition of the spherule layers occurred during the last...
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Journal Article
Published: 01 September 1998
Bulletin de la Société Géologique de France (1998) 169 (5): 709-723.
.... parvulum. Cruciplacolithus primus and Futyania petalosa and planktonic foraminiferal zones. Latest Maastrichtian assemblages are abundant and diverse, coccolithophores did not seem to be in decline in the latest Maastrichtian, though periods of stress are indicated by peaks in relative abundance of Micula...
Journal Article
Journal: Geology
Published: 01 August 1997
Geology (1997) 25 (8): 759-762.
... layer, the Cretaceous glauconitic clay is extensively burrowed and contains the uppermost Maastrichtian Micula prinsii calcareous nannofossil zone. Spherical impressions of spherules at the top of the Cretaceous indicate nearly instantaneous deposition of ejecta from the Chicxulub impact. The thickest...
Journal Article
Journal: Geology
Published: 01 March 1996
Geology (1996) 24 (3): 255-258.
... spherule-bearing clastic unit located precisely at the K-T boundary. The sections consist of uppermost Maastrichtian ( Micula prinsii Zone) marly limestones of the Mendez Formation and marlstones of the lower Paleocene (Zone NP1) Velasco Formation separated by a distinct, 1–3-m-thick sandstone unit...
Journal Article
Journal: Geology
Published: 01 September 1993
Geology (1993) 21 (9): 776-780.
... at Site 536 contains very rare Micula prinsii, the uppermost Maastrichtian index taxon, as well as low values of Ir (0.6 pbb) and rare Ni-rich spinels. These indicate possible reworking of sediments of K-T boundary age at the hiatus. Absence of continuous sediment accumulation across the K-T boundary...
Journal Article
Journal: Geology
Published: 01 April 1987
Geology (1987) 15 (4): 311-315.
... composition of benthic invertebrates, and lithologic characteristics indicate that a latest Maestrichtian regression culminated near the boundary (Chron C29R; Micula murus zone), significantly later than recent estimates. Water depths at this site remained shallow during the subsequent early Paleocene (zone...
Series: GSA Special Papers
Published: 01 January 1981
DOI: 10.1130/SPE187-p55
..., (5) Micula-Ketophyllum, (6) Weissermelia-Ataja, and (7) Mucophyllum-Pseudomicroplasma assemblages. The second part includes a discussion of the Silurian biogeography and types of sedimentation in China. Six sedimentation domains consisting of 15 sedimentation regions with various associations...
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Plot of absolute abundance of calcareous nannofossils versus  Watznaueria  ...
Published: 01 July 2005
F igure 8. Plot of absolute abundance of calcareous nannofossils versus Watznaueria spp./ Micula spp. in percentage of the total assemblage for the Kronsmoor section (left-hand side). Plot of species richness of calcareous nannofossils versus Watznaueria spp./ Micula spp. in percentage
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Katharina in typical discursive mode, Chateau de Blagnac France September 1...
Published: 01 May 2009
Fig. 1. Katharina in typical discursive mode, Chateau de Blagnac France September 1999, flanked by two of the many species she described: Micula prinsii and Cruciplacolithus primus , markers for the latest Maastrichtian and earliest Danian, respectively.
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Nannofossils from the Khanasir Limestone Member, Al Kharj section. All phot...
in > GeoArabia
Published: 01 October 2002
Plate 2: Nannofossils from the Khanasir Limestone Member, Al Kharj section. All photomicrographs were taken under polarized light and uniformly enlarged at x 2,500. (a) Lithraphidites quadratus Bramlette and Martini, 1964, parasequence 1c; (b) Micula decusssata, Vekshina, 1959, parasequence
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Figure 4. Calcareous nannofossil biostratigraphy of the Ardo section. FO—fi...
Published: 01 March 2007
Figure 4. Calcareous nannofossil biostratigraphy of the Ardo section. FO—first occurrence; LO—last occurrence; LRO—last rare occurrence. K/T—Cretaceous-Tertiary boundary; M .— Micula ; D .— Discoaster ; H .— Heliolithus ; C .— Cruciplacolithus ; T .— Tribrachiatus .
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Figure 6. Calcareous nannofossil biostratigraphy of the Forada section. FO—...
Published: 01 March 2007
Figure 6. Calcareous nannofossil biostratigraphy of the Forada section. FO—first occurrence; LO—last occurrence; LRO—last rare occurrence; BEE—benthic extinction event. CMU—clay marl unit; K/T—Cretaceous-Tertiary boundary; M .— Micula ; D .— Discoaster ; H .— Heliolithus ; C .— Cruciplacolithus
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Distribution of calcareous nannofossil taxa  Lithraphidites  spp.,  Predisc...
Published: 01 July 2005
F igure 6. Distribution of calcareous nannofossil taxa Lithraphidites spp., Prediscosphaera stoveri, Eiffellithus spp., Microrhabdulus spp., Micula spp., and Watznaueria spp. (in percentage of the total nannofossil assemblage), absolute abundance and species richness of calcareous