Late Ordovician carbonate buildups and erosional features northeast of Gotland, northern Baltic Sea

Tuuling, Igor; Flodén, Tom

doi:10.1080/11035890001222237

Cited by 26 publications

(46 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At a few localities, Boda mounds rest on Kullsberg mounds, the two mounds being separated by only a thin succession of the Fjäcka Shale and/or Jonstorp Formation (Jaanusson 1982). Similar two-mound successions appear to be present locally both in the Gotland subsurface and in the mound areas offshore Gotland (Flodén 1980;Tuuling & Flodén 2000). As shown above, the Klasen mounds are in all probability equivalent to the Boda mounds.…”

Section: Belongs To An Interval In the Fungochitina Fungiformis Zonementioning

confidence: 86%

“…Flodén (1980) mapped the location of more than 100 submarine mounds off western and northern Gotland, and between Gotland and western Estonia, and there are also scores of such mounds in the Gotland and Hiiumaa Island subsurface as well as elsewhere in Estonia (Hints & Meidla 1997). Offshore Gotland, the vast majority of these mounds occur in the lower part of the File Formation but some have been reported from the interval just below the O 4-5 reflector (Flodén 1980;Flodén et al 1994;Tuuling & Flodén 2000), that is, from the Slandrom Limestone in the stratigraphic classification proposed herein. On northern Gotland, the cluster of mounds located 5-10 km NE of Gisslause-1 ( Fig.…”

Section: Stratigraphic Terminologymentioning

confidence: 92%

“…The extensive geophysical work by Flodén (1980) on the submarine succession off shore Gotland in the central Baltic makes it possible to trace the File Formation quite widely where it stratigraphically corresponds to the upper part of his O 2 -S 1 interval. Flodén et al (1994) and later Tuuling & Flodén (2000) identified the interval of the Fjäcka Shale/Tudulinna Formations as an important regional marker reflector (O 4-5 ) and we interpret the File Formation as representing the stratigraphic interval between their O 4-5 and S 1 reflectors. It may be of interest to note that in the Gotland oil prospecting, the informal term Kvarne Formation was used for the O 4-5 reflector.…”

Section: Stratigraphic Terminologymentioning

confidence: 97%

“…One of the most interesting and economically important features of the Upper Ordovician succession in the Gotland subsurface and adjacent submarine areas is the occurrence of numerous mound structures that may reach a width of as much as 3 km (Flodén et al 1994) and a height of several tens of meters (Tuuling & Flodén 2000). Flodén (1980) mapped the location of more than 100 submarine mounds off western and northern Gotland, and between Gotland and western Estonia, and there are also scores of such mounds in the Gotland and Hiiumaa Island subsurface as well as elsewhere in Estonia (Hints & Meidla 1997).…”

Section: Stratigraphic Terminologymentioning

confidence: 99%

See 3 more Smart Citations

The stratigraphy of the Upper Ordovician carbonate mounds in the subsurface of Gotland

Bergström¹,

Löfgren²,

Grahn³

2004

GFF

View full text Add to dashboard Cite

In a revision of the stratigraphic classification of the subsurface Upper Ordovician succession of Gotland, the terms Lower and Upper Östersjö Limestone are rejected and replaced by the Slandrom Limestone and the File Limestone, respectively. Two mound generations are recognized, the RakveranNabalan Liste mounds and the Pirguan Klasen mounds, the latter being by far the most common. Both occur not only in the Gotland subsurface but also in submarine areas off Gotland. Moderately diverse conodont collections retrieved from core samples in and around carbonate mounds provide the first direct biostratigraphic dates of these structures. Samples from the Liste mounds contain species of the Amorphognathus superbus Zone. Besides the zonal index and numerous specimens of Panderodus, there are representatives of Amorphognathus complicatus Rhodes, Belodina confluens Sweet, Decoriconus costulatus (Rexroad), Protopanderodus liripipus Kennedy, Barnes & Uyeno, Pseudooneotodus mitratus (Moskalenko), Dapsilodus sp., Besselodus? sp. and a few other taxa. The Klasen mounds have not yet produced biostratigraphically diagnostic conodonts but comparison with non-mound successions indicate that they belong to the A. ordovicicus Zone. Their biostratigraphic age suggests that the Liste mounds may be slightly younger than the Kullsberg mounds, and the Klasen mounds equivalent to the Boda mounds, in the Siljan district.

show abstract

Section: Belongs To An Interval In the Fungochitina Fungiformis Zonementioning

confidence: 86%

Section: Stratigraphic Terminologymentioning

confidence: 92%

Section: Stratigraphic Terminologymentioning

confidence: 97%

Section: Stratigraphic Terminologymentioning

confidence: 99%

See 2 more Smart Citations

The stratigraphy of the Upper Ordovician carbonate mounds in the subsurface of Gotland

Bergström¹,

Löfgren²,

Grahn³

2004

GFF

View full text Add to dashboard Cite

show abstract

“…Ex ten sive seis mic pro fil ing since the early 1960s has resulted in a huge amount of data about the dis tri bu tion, thick -nesses, and thus struc ture of dif fer ent Pa leo zoic lay ers beneath the cen tral Bal tic Sea (Flodén, 1975(Flodén, , 1980Flodén et al, 1994Flodén et al, , 2001Tuuling et al, 1995Tuuling et al, , 1997Tuuling and Flodén 2000a, 2009a, b, 2011. Fus ing this in forma tion with the sur round ing main land knowl edge, this pa per aims to gen er al ise the struc ture of the plat form sed i men tary cover on the south ern slope of the Bal tic Shield, and to analyse its changes/trends from Es to nia to the Swed ish east coast.…”

Section: Introductionmentioning

confidence: 99%

Paleozoic rocks structure versus Cenozoic cuesta relief along the Baltic Shield–East European Platform transect

Tuuling

2017

Self Cite

View full text Add to dashboard Cite

1 Uni ver sity of Tartu, In sti tute of Ecol ogy and Earth Sci ences, Ravila 14A, 50411 Tartu, Es to nia Tuuling, I., 2017. Pa leo zoic rocks struc ture ver sus Ce no zoic cuesta re lief along the Bal tic Shield-East Eu ro pean Plat form transect. Geo log i cal Quar terly, 61 (2): 396-412, doi: 10.7306/gq.1342Based on struc tural maps, the bed rock struc ture on the south ern slope of the Bal tic Shield is ana lysed. Gently south erly dipping (0.1-0.2°) Paleozoic lay ers from Es to nia to the Swed ish east coast form the Bal tic Homocline (BH). Nu mer ous monoclinal folds, forced by base ment fault ing, in duce slight vari a tions in bed rock at ti tude across the BH. Stud ies on faults ex posed in South ern Fin land sug gest that many monoclinal folds in duc ing base ment faults within the BH are of Pre cam brian or i gin and have been ac tive in pulses. The pres ent mono clines were shaped by the Cal edo nian Orog eny. Submeridional tectonic hinge-lines in duce mi nor re gional-scale changes in the struc tural set ting and con trol trends/styles of the forced folds. From the west, the BH bounds with the Bal tic-Bothnian mo bile zone that has been in ter mit tently ac tive since Mesoproterozoic times. The evolv ing Bal tic Syneclise in the Si lu rian re ar ranged the struc tural set ting typ i cal for the Or do vician Bal tic Ba sin. The Ce no zoic up lift of Scan di na via cre ated a SE-to-E-dip ping bed rock se quence around the Gotland-Öland area. As the lat ter area had a dif fer ent at ti tude than the BH, two Ce no zoic cuesta-sets started to evolve around the north ern Bal tic Proper. They both had an out let to the N-S-flow ing Eridanos River around the Gotska Sandön area, cre at ing thus two in de pend ent sec tions of the Bal tic Klint.

show abstract

Geophysical well log-motifs, lithology, stratigraphical aspects and correlation of the Ordovician succession in the Swedish part of the Baltic Basin

Erlström

Sopher

2019

Int J Earth Sci (Geol Rundsch)

View full text Add to dashboard Cite

The geophysical characteristics of the carbonate-dominated Ordovician succession is described using wire-line logging data from exploration wells located within the Swedish part of the Baltic Basin, both offshore and from the island of Gotland. The petrophysical properties and log-motifs are compared and correlated with the lithology of cores from the Hamra-10, Skåls-1 and Grötlingbo-1 wells on southern Gotland. The 80-125-m-thick Ordovician succession is divided into five log stratigraphic units O a-O e , which are correlated throughout the study area. The proposed log stratigraphy and wire-line log characteristics are evaluated and compared with the established Ordovician stratigraphy from the adjacent areas of Öland, Östergötland and South Estonia. The newly established log stratigraphy is also linked to the existing seismic stratigraphic framework for the study area and exemplified with a selection of interpreted seismic type sections from Gotland and the south Baltic Sea. The presented characterization, division and correlation provide a basis for understanding the lateral and vertical variation of the petrophysical properties, which are essential in assessing the sealing capacity of the Ordovician succession, in conjunction with storage of CO 2 in the underlying Cambrian sandstone reservoir.

show abstract

Late Ordovician carbonate buildups and erosional features northeast of Gotland, northern Baltic Sea

Cited by 26 publications

References 8 publications

The stratigraphy of the Upper Ordovician carbonate mounds in the subsurface of Gotland

The stratigraphy of the Upper Ordovician carbonate mounds in the subsurface of Gotland

Paleozoic rocks structure versus Cenozoic cuesta relief along the Baltic Shield–East European Platform transect

Geophysical well log-motifs, lithology, stratigraphical aspects and correlation of the Ordovician succession in the Swedish part of the Baltic Basin

Contact Info

Product

Resources

About