Far-field correlation of palaeokarstic surfaces in Mississippian successions using high-frequency foraminiferal diversity trends

Middle to Late Mississippian and Early Pennsylvanian foraminiferal zonal scheme of South China—a case study from the Youjiang Basin: biostratigraphical and palaeobiogeographical implications

“…Makhlina et al 1993), and from the early Asbian in England (e.g. Cózar et al 2022bCózar et al , 2022c. No palaeokarst has been detected in this lower part of the section, and a continuous succession is inferred.…”

Rock Magnetic‐Based Cyclic Expression in Late Visean Ramp Carbonates and an Astrochronology for the Late Asbian From Northwest England

“…Other regions of late Asbian carbonates may differ in their allochem contents to the ULF, but show a similar style of organized behavior (Cózar & Somerville, 2005; Davies, 1982; Gallagher, 1996; Giles, 2009; Kabanov et al., 2016). Fourthly, species and genera diversity in foraminifera may also display cyclical changes (Cózar, Somerville, Hounslow, & Coronado, 2022), perhaps responding in a similar same way to the forcing evident by differing allochem assemblages. These and the foraminifera sub‐zonations provide a means to sub‐divide the succession at Trowbarrow into major emergent surfaces (O to XII; Figure 3a) that can be widely correlated and related to intervals of rhythms which are bounded by these major surfaces (labeled Rh1 to Rh 13; Figure 3a).…”

“…The Middle Mississippian (Asbian) study section used is at Trowbarrow Quarry in NW England (Figure 1a), which has a well-defined foraminiferal biostratigraphy, which acts as a reference section for this substage interval (Cózar, Somerville, Hounslow, & Coronado, 2022;Cózar, Somerville, Hounslow, & Kamenikova, 2022) and as we show, has a moderate accumulation rate. Carbonate cycles at Trowbarrow (Horbury, 1987) are distinct from the classic "Yoredale," carbonate-clastics-coal-type cyclothems (Fielding et al, 2008) and are here referred to as rhythms, following Davies (1982) and Cózar, Somerville, Hounslow, and Coronado (2022). The term "cycle" is used here to refer to This study focuses on unraveling the nature of cyclicity in upper Asbian shallow marine carbonates, by using a combination of petrographic study, rock magnetic proxies and astrochronological testing.…”

“…Relatively few Pennsylvanian cyclostratigraphic studies have used robust statistical methods for astronomical period identification (Montañez, 2022 lists six key studies), but have instead largely relied on essentially sequence stratigraphic cycle‐counts paced to radioisotopic anchor points (Davydov et al., 2010; Heckel, 2013; Pointon et al., 2012). The Mississippian has even fewer quantitative cyclostratigraphic studies, since many of the better‐studied successions are low paleolatitude, shallow water carbonate systems, which express cyclicity in differing ways to cyclothems (Cózar, Somerville, Hounslow, & Coronado, 2022; Wright et al., 1997). Also, for low paleolatitude sites, unraveling the impact of cyclical changes in climate driven by probable superimposed monsoonal and ice‐volume changes in the Carboniferous is a complex problem (Opluštil et al., 2022).…”

Foraminifers and conodonts in the Danlu section, South China: implications for the Viséan–Serpukhovian boundary (Mississippian)

“…High-amplitude sea-level falls related to the onset of the main phases of glaciation during the LPIA have been suggested to control the depositional architectures of tectonically stable craton basins worldwide (e.g. Smith & Read, 2000; Wright & Vanstone, 2001; Bishop et al 2009; Eros et al 2012; Fielding & Frank, 2015; Chen et al 2019; Cózar et al 2022 b ; Montañez, 2022). Hence, sequence stratigraphy in those regions should be similar, unless regional tectonics have overridden glacioeustasy and modified the patterns.…”