Abstract
(1) The ancient Paratethys Sea was a spacious inland salt-water basin, extending from the Alps, over Central Europe, to Central Asia. The southwestern part of its central area, the Croatian part of the Pannonian Basin System (CPBS), is generally known for shallow-water deposition and biota. The main purpose of this paper is to emphasize the significance of its less widespread deeper-water deposits in environmental and applied geology. (2) The authors consulted the previously published data, combined with their own results, obtained from the paleontological and sedimentological research, seismic stratigraphy and well-log analyses. (3) During our research in the CPBS, we noticed the connection between the tectonic structures and deep marine canyons and depressions within the Paratethyan shallows. Such structures can be recognized on well-logs and seismic or surface outcrops. They are situated along the faults, and deposits are characterized by the domination of pelagic over the benthic biota, sometimes with visible selective dissolution of aragonite/calcite tests. (4) Studied sedimentary sequences from these structures proved to be a precious source of data on the transgressive-regressive cycles, ancient migrations, modes of deposition and hydrocarbon formation during the Miocene Epoch in the CPBS.
Highlights
Deep marine sedimentary sequences are highly valued among geologists, as they often comprise complete information on depositional models and paleoenvironments not present in shallow-water successions
Such structures can be recognized on well-logs and seismic or surface outcrops. They are situated along the faults, and deposits are characterized by the domination of pelagic over the benthic biota, sometimes with visible selective dissolution of aragonite/calcite tests
(4) Studied sedimentary sequences from these structures proved to be a precious source of data on the transgressive-regressive cycles, ancient migrations, modes of deposition and hydrocarbon formation during the Miocene Epoch in the Croatian part of the Pannonian Basin System (CPBS)
Summary
Deep marine sedimentary sequences are highly valued among geologists, as they often comprise complete information on depositional models and paleoenvironments not present in shallow-water successions. The Western Paratethys was soon isolated and dried out, and only the Central and the Eastern marine basins were flooded during the Middle Miocene. They were temporarily connected, and had periodical communication with other marine areas (Figure 1) (e.g., [2,3,21–26] and references therein). Miocene marine sedimentary rocks in northern Croatia (Figure 3) were deposited at Geosciences 2022, 12, x FOR PEER REVthIEeWSW edge of the Central Paratethys, named the Croatian part of the Pannonian4Boafsi3n1. GGeeoollooggiiccaall mmaapp ooff nnoorrtthheerrnn aanndd nnoorrtthh‐-eeaasstteerrnn CCrrooaattiiaa ((mmooddiiffiieedd aafftteerr [[5555]])) wwhhiicchh wwaass,, during the Miocene, flooded by the Paratethys Sea. Paratethyan deposits are marked with yellow, danudrifnagutlthsewMitihocreednec,ofllooro.dLeedgebnydt:h1e. We compared the obtained results with the published data from the neighboring areas in order to establish the correlation between the different approaches to the deep-marine Miocene environment
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