Relative sea-level changes during Middle Ordovician through Mississippian deposition in the Iowa area, North American Craton

Carbon isotope stratigraphy of Lochkovian to Eifelian limestones from the Devonian of central and southern Europe

“…Most Silurian sea level curves of Laurentia and Baltica show a regression and sea-level lowstand for the latest Silurian (Ross and Ross 1996;Witzke and Bunker 1996).This is the consequence of the final Caledonian Johnson et al (1985Johnson et al ( , 1996. D Johnson's curve and events in the interpretation of Walliser (1996) and House (2002) collision which led to erosion of large Silurian carbonate platforms and initiated the deposition of the wide spread predominantly continental "Old Red" sandstones.…”

Gauging the impact of glacioeustasy on a mid-latitude early Silurian basin margin, mid Wales, UK

“…The contact with the succeeding Tete des Morts Formation (= Birds Member, Wilhelmi Fm) was described as gradational and the Mosalem and Tete des Morts formations were reported by Witzke (1992) to form part of an uninterrupted period of deepening. Witzke & Bunker (1996) gave an alternative view, suggesting that the Mosalem Formation might form a 'discrete T-R cycle'. The top of the shoaling phase shown by Ross & Ross (1996) was subsequently adopted and widely correlated by subsequent workers in the US as an intra-Rhuddanian sequence (or sub-sequence) boundary (e.g.…”

“…521 Baarli et al, 2003;Dahlqvist and Bergström, 2005 Johnson et al, 1991a;Baarli et al, 2003 is evidence of a deepening maximum (A) (e.g. Witzke and Bunker, 1996;Dewing, 1999;536 Zhang and Barnes, 2002b;Melchin and Holmden, 2006;Long, 2007). Other curves show a 537 deepening episode extending from the Hirnantian that peaked at different times during the 538 early Rhuddanian (e.g.…”

“…1979Johnson (e.g. , 1987Johnson et al, 1985;Johnson et al, 487 1991b) and Witzke (1992;Witzke and Bunker, 1996), Johnson (1996) Baltica (e.g. Baarli et al, 2003) offer insights into the number and scale of lower order base 497 level events in these areas (Figs.…”

Calibrating seismic fracture prediction using borehole image logs, application to the Mississippian limestone

“…The sea underwent transgressive, regressive cycles, which created a stratal geometry that is interpreted as shallowing upward sequences (Witzke and Bunker, 1996). There are four stacked transgressiveregressive cycles of progradation in the Mississippian section, and these four stacked sequences make up a third-order transgressive-regressive cycle bounded with an unconformity above and below (Manger, 2011).…”