Deciphering the history of climate and sea level in the Kimmeridgian deposits of Bure (eastern Paris Basin)

Palaeoenvironmental changes recorded in the oxygen and carbon isotope composition of Kimmeridgian (Upper Jurassic) carbonates from central Poland

“…The ox y gen and car bon iso tope val ues of Lower Kimmeridgian bi valves from cen tral Po land (-3.5 to -0.6‰, and 2.6 to 4.2‰, re spectively) are com pa ra ble to those from shal low-ma rine fa cies of the Paris Ba sin, Bur gundy, the Jura Moun tains, and the Lower Sax ony ba sin (cf. Brigaud et al, 2008;LathuiliÀre et al, 2015;Colombié et al, 2018;Zuo et al, 2019). Low d 18 O val ues of Lower Kimmeridgian fos sils from west ern Eu rope are likely related to shallowing of epicontinental ma rine bas ins.…”

The Oxfordian–Kimmeridgian transition in the Boulonnais (France) and the onset of organic-rich marine deposits in NW Europe: a climatic control?

“…Note (1) the corresponding shift toward warmer climates at the onset of ORB deposition, (2) the association of the ORB system with stable, warm climates and (3), the termination of the ORB system in NW European basins as a large-scale cooling trend is obvious during the middle part/upper part of the Tithonian. Isotopic data from the Paris Basin: white squares after Brigaud et al [2008] and Lathuilière et al [2015]; black dots after Dera et al [2011].…”

“…Interestingly, the onset of the late Jurassic ORB at the early/late Kimmeridgian boundary as shown in this work is contemporaneous to a large-scale (global?) climate warming that can be evidenced in the Paris Basin [Brigaud et al, 2008, Dera et al, 2011, Lathuilière et al, 2015, in Scotland, UK [Nunn and Price, 2010] and in the Russian Platform [Price and Rogov, 2009] using oxygen isotopes measured on mollusc or belemnite fossils (Figure 6). All these records show an isotopic shift of around 2 toward more negative values, beginning in the middle-late Oxfordian (Regulare zone in the Paris Basin) and ending with the more negative values at around the early/late Kimmeridgian boundary (in the top Cymodoce or the Mutablis zone in the Paris Basin, see Figure 6).…”

“…Black stars: Organic-rich bands (ORB) sites cited in this work, 1: Yorkshire; 2: Dorset, 3: Boulonnais (this work), 4: Normandy, 5: Charentes, 6: Quercy. Red dots: selected sites with published sea-water paleotemperatures, 1: Paris Basin [Brigaud et al, 2008, Dera et al, 2011, Lathuilière et al, 2015; 2: Scotland [Nunn and Price, 2010]; 3: Russian platform [Price and Rogov, 2009]. ied during the last decades, both in England [e.g.…”