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Selli Level

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Journal Article
Journal: Palynology
Published: 01 July 2016
Palynology (2016) 40 (2): 230-246.
... Formation (Tithonian–lowermost Aptian) and the polychrome marls of the Marne a Fucoidi Formation (Aptian–Albian). The Oceanic Anoxic Event 1a (OAE 1a) anoxic horizon (Selli Level) is located in the latter formation. Here, we report for the first time a palynostratigraphical assessment of this key section...
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Journal Article
Published: 01 October 2013
Italian Journal of Geosciences (2013) 132 (3): 477-496.
... hiatuses within the chemostratigraphic Selli level: biostratigraphic and sedimentary-diagenetic analyses document a continuous record of fully subtidal conditions. Furthermore, the Borgo Celano section allows correlation of the shallow- and deep-water records without intervening stratigraphic breaks. Upper...
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Journal Article
Published: 01 October 1999
Journal of Foraminiferal Research (1999) 29 (4): 352-370.
...Isabella Premoli Silva; Elisabetta Erba; Giovanni Salvini; Cecilia Locatelli; Davide Verga Abstract The two major episodes of C org -rich black shales, namely the Selli (early Aptian) and Bonarelli (latest Cenomanian) Levels, corresponding to the anoxic Events OAE1a and OAE2, were studied...
Series: GSA Special Papers
Published: 01 May 2015
DOI: 10.1130/2015.2511(17)
... Among various paleoenvironmental proxy records across the lower Aptian Selli Level (Umbria-Marche basin, Italy) and its equivalents (i.e., sedimentary expressions of oceanic anoxic event [OAE] 1a), one very intriguing feature is a prominent negative δ 13 C excursion at the base...
Journal Article
Journal: Geology
Published: 01 September 2009
Geology (2009) 37 (9): 855-858.
... event 1 (OAE1a). A causative link between these events has been suggested, but direct evidence has been lacking until now. New Os isotope measurements across the Lower Aptian “Selli Level” black shale deposited during OAE1a in central Italy reveal two negative excursions in marine 187 Os/ 188 Os ratios...
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Journal Article
Published: 01 May 2001
Geological Magazine (2001) 138 (3): 277-298.
.... According to our biostratigraphic data, the deposition of organic matter in the Gargano Promontory persisted through Early/Late Aptian boundary time. Using a chemostratigraphic definition, only the lower black shale is referred to the Selli Level. As far as the biotic response is concerned, the onset...
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...). The lithological expression of OAE 1a is the organic-rich black shale unit known as the Selli Level. The comparison of our magnetostratigraphic, biostratigraphic, and chemostratigraphic records throughout the Barremian-Aptian boundary with those available from previously investigated oceanic and land-based sites...
Series: GSA Special Papers
Published: 01 May 2015
DOI: 10.1130/2015.2511(16)
... ), in conjunction with radiolarian biostratigraphic data, we propose that a 1.3-m-thick interval within the examined section is correlative with Tethyan Selli Level (Apennines, Italy), a sedimentary expression of oceanic anoxic event (OAE) 1a. Specifically, the δ 13 C org record illustrates a discernible negative...
Journal Article
Journal: GSA Bulletin
Published: 01 November 2008
GSA Bulletin (2008) 120 (11-12): 1416-1426.
... carbon, and these date to the early Aptian and late Albian–early Cenomanian. These time intervals correspond to two mid-Cretaceous oceanic anoxic events (OAEs): early Aptian OAE1a (equivalent to the “Selli level”) and late Albian OAE1d (equivalent to the “Breistroffer event”). It is well established...
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