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Stratigraphy of the Gorstian and Ludfordian (upper Silurian) Hemse Group reefs on Gotland, Sweden

Taromi Sandström, Olof ; Dahlqvist, Peter LU ; Erlström, Mikael LU ; Persson, Lena ; Kershaw, Steve and Calner, Mikael LU (2021) In GFF
Abstract

The Hemse Group is one of the least understood stratigraphic units of the Silurian sequence of Gotland, Sweden. New results from airborne transient electromagnetic (ATEM) measurements in combination with previously published data from field studies and geophysical investigations shed new light on carbonate platform development during the early- to mid-Ludlow Hemse Group. ATEM reveals a transgressive phase that began near the Wenlock-Ludlow boundary, which resulted in deposition of marls and corresponds roughly to the Hemse limestone units a-c and the Hemse Marl NW. In this phase little or no reef development occurs. The end of the transgressive phase coincides with the weak Linde Event. The following highstand favoured extensive reef... (More)

The Hemse Group is one of the least understood stratigraphic units of the Silurian sequence of Gotland, Sweden. New results from airborne transient electromagnetic (ATEM) measurements in combination with previously published data from field studies and geophysical investigations shed new light on carbonate platform development during the early- to mid-Ludlow Hemse Group. ATEM reveals a transgressive phase that began near the Wenlock-Ludlow boundary, which resulted in deposition of marls and corresponds roughly to the Hemse limestone units a-c and the Hemse Marl NW. In this phase little or no reef development occurs. The end of the transgressive phase coincides with the weak Linde Event. The following highstand favoured extensive reef growth forming a reef barrier system of both fringing reefs and more rampiform settings with stromatoporoid biostromes and occasional biohermal buildups. The Kuppen-Snabben Unconformity Complex marks an erosional (karstic) sequence boundary and rocky shoreline and the transition from a rampiform setting with reef biostromes towards a more rimmed setting with patch reefs.

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author
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organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
facies associations, geographic model, Gotland, ramps, rocky shorelines, Silurian, Unconformity
in
GFF
publisher
Taylor & Francis
external identifiers
  • scopus:85099641721
ISSN
1103-5897
DOI
10.1080/11035897.2020.1858959
language
English
LU publication?
yes
id
fabb7bd6-d706-40ff-9fb3-bf80087b088c
date added to LUP
2021-02-03 12:22:46
date last changed
2021-02-03 12:22:46
@article{fabb7bd6-d706-40ff-9fb3-bf80087b088c,
  abstract     = {<p>The Hemse Group is one of the least understood stratigraphic units of the Silurian sequence of Gotland, Sweden. New results from airborne transient electromagnetic (ATEM) measurements in combination with previously published data from field studies and geophysical investigations shed new light on carbonate platform development during the early- to mid-Ludlow Hemse Group. ATEM reveals a transgressive phase that began near the Wenlock-Ludlow boundary, which resulted in deposition of marls and corresponds roughly to the Hemse limestone units a-c and the Hemse Marl NW. In this phase little or no reef development occurs. The end of the transgressive phase coincides with the weak Linde Event. The following highstand favoured extensive reef growth forming a reef barrier system of both fringing reefs and more rampiform settings with stromatoporoid biostromes and occasional biohermal buildups. The Kuppen-Snabben Unconformity Complex marks an erosional (karstic) sequence boundary and rocky shoreline and the transition from a rampiform setting with reef biostromes towards a more rimmed setting with patch reefs.</p>},
  author       = {Taromi Sandström, Olof and Dahlqvist, Peter and Erlström, Mikael and Persson, Lena and Kershaw, Steve and Calner, Mikael},
  issn         = {1103-5897},
  language     = {eng},
  month        = {01},
  publisher    = {Taylor & Francis},
  series       = {GFF},
  title        = {Stratigraphy of the Gorstian and Ludfordian (upper Silurian) Hemse Group reefs on Gotland, Sweden},
  url          = {http://dx.doi.org/10.1080/11035897.2020.1858959},
  doi          = {10.1080/11035897.2020.1858959},
  year         = {2021},
}