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. The Toarcian Oceanic Anoxic Event (T-OAE) interval was cored at Colle diSogno and Gajum in the Lombardy Basin (Southern Alps, northern Italy). TheSogno and Gajum cores recovered 26.83 and 31.18 stratigraphic metres, respectively, of pelagic sediments consisting of marlylimestones, marlstone, marly claystone, and black shale. Drilling at bothsites resulted in 100 % recovery of unweathered material. The pelagicsuccession comprises a relatively expanded black shale interval of 4.98 m inthe Sogno core and 15.35 m in the Gajum core, with lower and upperboundaries without evidence of hiatuses. The Sogno and Gajum cores can beconsidered reference sections for the pelagic lower Toarcian interval of thewestern Tethys and will provide high-resolution micropaleontological,inorganic and organic geochemical, isotopic multiproxy data. Integratedstratigraphy and cyclostratigraphy are predicted to result in estimates ofdurations and rates to model the ecosystem resilience to the extremeperturbations of the T-OAE and gain a better understanding of current globalchanges and help provide better projections of future scenarios.

Coring the sedimentary expression of the early Toarcian Oceanic Anoxic Event: new stratigraphic records from the Tethys Ocean