Geometry and architectural associations of co-genetic debrite–turbidite beds in basin-margin strata, Carboniferous Ross Sandstone (Ireland): Applications to reservoirs located on the margins of structurally confined submarine fans

Short length-scale variability of hybrid event beds and its applied significance

“…It is dominantly muddy (>90%) but is punctuated by six thick sandy event beds, the lower three of which are shown Figure 9. These were previously interpreted as slumps by Pyles and Jennette (2009), but they are here considered as the deposits of infrequent highly-efficient hybrid flows that travelled along the axis of the basin (Barker, 2005). They have unusually coarse-grained and dewatered sandy bases, in comparison to the monotonous fine and very fine structureless sandstones that characterise the rest of the Ross Formation.…”

Defining the concept of stratigraphic grade and applying it to stratal (reservoir) architecture and evolution of the slope-to-basin profile: An outcrop perspective

“…(B) Map and chronostratigraphic chart of the Ross Sandstone. The map shows the outcrop belt of the Ross Sandstone and data used in this study (modified from Hodson and Lewarne, 1961;Holland, 1981;Martinsen et al, 2000;Wignall and Best, 2000;Pyles, 2007Pyles, , 2008Pyles and Jennette, 2009). The chronostratigraphic chart shows the temporal relationships among the Namurian formations in the study area (lithostratigraphy and environments of deposition after Rider, 1974;ages from Menning et al, 2000).…”

“…The chronostratigraphic chart shows the temporal relationships among the Namurian formations in the study area (lithostratigraphy and environments of deposition after Rider, 1974;ages from Menning et al, 2000). Sources for data in the geologic map are: A: (Doonbeg): Croker (1995), Pyles (2008); B: (Loop Head): Collinson et al (1991), Lien et al (2003), Pyles (2008); C: (Ballybunnion): Ramsbottom et al (1978), Collinson et al (1991), Lien et al (2003), Pyles (2008), Pyles and Jennette (2009); D: (Castleisland): Brennand (1965); E: (Slieve Elva): Hodson (1954b) Hodson and Lewarne (1961); F: (Lisdoonvarna, Fisherstreet): Hodson (1954b), Hodson and Lewarne (1961); G: (Magowna Castle): Hodson and Lewarne (1961); H: (Killea-Cragbrien): Hodson and Lewarne (1961); I: (Inishcorker Island): Hodson and Lewarne (1961); Braithwaite (1993), Pyles and Jennette (2009); J: (Foynes Island): Hodson (1954a); Hodson and Lewarne (1961); K: (Ballagh): Lewarne (1959), Philcox (1961); L: (Newmarket): Morton (1965); and M: (Templemary): Philcox (1961); offshore areas constrained by Tate and Dobson (1989); Tate (1993).…”

“…2B). The stratigraphy of the Ross Sandstone has been described in numerous papers (Hodson and Lewarne, 1961;Rider, 1974;Collinson et al, 1991;Chapin et al, 1994;Elliott, 2000a,b;Martinsen et al, 2000Martinsen et al, , 2003Sullivan et al, 2000;Wignall and Best, 2000;Martinsen and Collinson, 2002;Wignall and Best, 2002;Lien et al, 2003;Pyles, 2004Pyles, , 2007Pyles, , 2008Pyles, , 2009Pyles and Jennette, 2009). The Ross Sandstone was deposited in the Carboniferous Shannon Basin (Martinsen et al, 2000Pyles, 2008).…”

Comments on ‘Hybrid sediment gravity flows – classification, origin and significance’ from Haughton, Davis, McCaffrey and Barker (Marine and Petroleum Geology, 2009, 26, 1900–1918)

“…The recent Marine and Petroleum Geology thematic issue (December 2009) on sediment gravity flows includes a review of "hybrid beds" by Haughton et al (2009), followed by six articles on specific examples Felix et al, 2009;Georgiopoulou et al, 2009;Hodgson, 2009;Jackson et al, 2009;Pyles and Jennette, 2009). Like previous authors, Haughton et al (2009) interpret a hybrid bed as the combined (successive) turbiditeedebrite deposit of a deep-sea, slump-triggered flow.…”