Höör Sandstone
Members
Stanstorp member
This member represents the older layers of the formation, being exposed in the abandoned stanstorpsgraven quarry and in the Vittseröd area. The member is mainly composed by sandstone and has abundant plants fossils, with both allochthonous plant fragments and plant roots indicating vegetation in situ (palaeosols). The layers suggest several types of fluvial and/or coastal depositions, from dunes and river banks to beach deposits, where the palaeocurrent directions are clear generally from the north-east to the south-west. This section hosts abundant conglomerate intercalations, with the lower ones formed by mud fragments and the uppers with distant source material, both abundant on wood fragments, some of them up to 20 cm in diameter.
Vittseröd member
The youngest member is composed by finer-grained and much better sorted sandstones, with limited abundance of mudstones and plant fragments small and limited to a few horizons. The presence of silt and mature quartz arenites, well sorted and fairly well rounded derived from strongly altered feldspars, shows that this member hosted a high-energy environment, one where tidal currents have been invoked for the modification of fine-grained sandstones, linked with the changes of the Laurasian Seaway. The upper parts of this unit are influenced by the initial pulse of the Pliensbachian coeval vulcanism with heavy volcanic minerals in the uppermost layers.
Fauna
Ichnofossils
Color key
|
Notes Uncertain or tentative taxa are in small text; |
- Lockeia siliquaria (Bivalves)
- Planolites annularis (Polychaetes)
- Planolites montanus (Polychaetes)
- Diplichnites isp. (Xiphosurans, Insects, Arachnids)
- Teichichnus isp. (Polychaetes, Echiurans, Holothurians.)
- Skolithos isp. (Polychaetes, Phoronidans)
- Monocraterion tentaculatum (Polychaeta, Sipuncula, Enteropneustans & Echiurans)
- Rhizocorallium isp. (Polychaeta, Sipuncula, Enteropneustans & Echiurans)
- Aulichnites isp. (Gastropods)
- Diplocraterion parallelum (Polychaeta, Sipuncula, Enteropneustans & Echiurans)
Bivalves
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
|---|---|---|---|---|---|---|
|
Liostrea hisingeri |
|
|
Isolated Shells |
An oyster, member of Ostreidae inside Ostreida. The most common Bivalve found locally, indicator of increased salinity levels on the Hettangian layers. |
 | |
|
Cardinia follini |
|
|
Isolated Shells |
A clam, member of Cardiniidae inside Carditida. This faunal aggrupation occurs together with abundant foliar remains and are equivalent to the Brandsberga erratics, which was closer to the mouth of the bay developed in the region, as it proves the find on its sandstone of more clear marine fauna. |
||
|
Avicula inaequivalvis |
|
|
Isolated Shells |
A Scallop, member of Pectinidae inside Pectinida. The local material assigned to this genus is now lost |
||
|
Pecten sp. |
|
|
Isolated Shells |
A Scallop, member of Pectinidae inside Pectinida. |
 |
Arthropoda
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
|---|---|---|---|---|---|---|
|
Mesolimulus? nathorsti |
|
Vittseröd Member |
SMNH Ar33179, a possible prosomal section |
A horseshoe crab, member of the Limulidae inside Xiphosura. This fragment has been considered to be a Limulus or Mesolimulus prosomal shield, but due to the limited and fragmentary nature some authors referred to it as ?Chelicerata incertae sedis. |
||
|
Angelinella angelini |
Kulla Gunnarstorp |
Stanstorp Member |
Elytrons |
A beetle, incertae sedis Archostemata inside Coleoptera. |
||
|
Paracurculionites parvulus |
North of Sofiero |
Stanstorp Member |
Elytrons |
A beetle, incertae sedis Archostemata inside Coleoptera. |
Flora
| Genus | Species | Stratigraphic position | Member | Material | Notes | Images |
|---|---|---|---|---|---|---|
|
|
Stanstorp Member |
|
Affinities with Equisetaceae inside Equisetales. |
 | |
|
|
|
|
Affinities with Osmundaceae inside Osmundales. |
||
|
|
|
|
Affinities with Osmundaceae inside Osmundales. |
 | |
|
|
|
|
Affinities with Dipteridaceae inside Polypodiales. Dictyophyllum is a common Dipteridacean genus of the mid-Mesozoic |
 | |
|
|
|
|
Affinities with Dipteridaceae inside Polypodiales. |
||
|
|
|
|
Affinities with Dipteridaceae inside Polypodiales. |
 | |
|
|
|
|
Affinities with Dipteridaceae inside Polypodiales. |
||
|
|
|
|
Affinities with Dipteridaceae inside Polypodiales. |
 | |
|
|
|
|
Affinities with Peltaspermaceae inside Pteridospermatophyta. Indicator or reworked Rahetian layers. |
||
|
|
|
|
Affinities with Umkomasiaceae inside Pteridospermatophyta. |
||
|
|
|
|
Affinities with Umkomasiaceae inside Pteridospermatophyta. |
 | |
|
|
|
|
Affinities with Caytoniaceae inside Pteridospermatophyta. |
 | |
|
|
Vittseröd Member |
|
Affinities with Cycadales inside Cycadopsida. |
 | |
|
|
Vittseröd Member |
|
Affinities with Cycadeoidaceae inside Bennettitales. |
||
|
|
Vittseröd Member |
|
Affinities with Cycadeoidaceae inside Bennettitales. |
||
|
|
Vittseröd Member |
|
Affinities with Cycadeoidaceae inside Bennettitales. |
.jpg) | |
|
|
Stanstorp Member |
|
Affinities with Williamsoniaceae inside Bennettitales. Wielandiella may be regarded as a fossil taxon characterized by bennettitalean shrubs with branched stems and a divaricate architecture |
 | |
|
|
Vittseröd Member |
|
Affinities with Williamsoniaceae inside Bennettitales. In the uppermost layers is the dominant macroflora outside Pelmastermales |
 | |
|
|
Vittseröd Member |
|
Affinities with Williamsoniaceae inside Bennettitales. |
 | |
|
|
|
|
Affinities with Czekanowskiales inside Ginkgoales. |
||
|
|
|
|
Affinities with Ginkgoaceae inside Ginkgoales. |
 | |
|
|
|
|
Affinities with Schizolepisaceae inside Pinaceae. Associated with Pinaceae thanks to the presence of separated seen scales and bract scales. |
||
|
|
|
|
Affinities with Palissyaceae inside Palissyales. |
 | |
|
|
|
|
Affinities with Krassiloviaceae inside Voltziales. The local Podozamites show a rather great range of growth, reflecting tropical to subtropical conditions. |
 | |
|
|
|
|
Affinities with Sequoioideae inside Cupressales. |
 |
References
- ^ Vajda, V.; Linderson, H.; McLoughlin, S. (2016). "Disrupted vegetation as a response to Jurassic volcanism in southern Sweden". Geological Society, London, Special Publications. 434 (1): 127–147. Bibcode:2016GSLSP.434..127V. doi:10.1144/SP434.17. S2CID 53626549. Retrieved 30 July 2021.
- ^ Nilsson, S. (1819). "Beskrifning öfver en petrificat-förande Sandsten vid Hör i Sk¯ne". Kungliga Vetenskapsakademiens Handlingar. 23 (2): 144–148.
- ^ Ahlberg, Anders; Sivhed, Ulf; Erlström, Mikael (2003), "The Jurassic of Skåne, southern Sweden" (PDF), Geological Survey of Denmark and Greenland Bulletin, 1: 527–541, doi:10.34194/geusb.v1.4682, retrieved 2020-07-09
- ^ Brogniart, A. (1826). "De l'arkose — Caracteres mineralogiques et histoire geognostique de cette roche". Ann. Sci. Nat. 4 (1): 200–218.
- ^ Warnock, S. (1983). "Geology of the Röstnga District, Central Skane". Bachelor of Science Thesis in Geology, Queens University. Belfast. 1 (1): 1–160.
- ^ Sivhed, Ulf (1984). "Litho-and biostratigraphy of the Upper Triassic-Middle Jurassic in Scania, southern Sweden" (PDF). Sveriges geologiska undersökning. 31 (12): 31–50. Retrieved 11 February 2021.
- ^ Troedsson, G. (1940). "Om Höörs sandsten". Geologiska Föreningen i Stockholm Förhandlingar. 62 (3): 245–283. doi:10.1080/11035894009452796. Retrieved 24 December 2021.
- ^ Pieńkowski, G. (2002). "Lithofacies and palaeoenvironmental interpretation of the Early Jurassic Höör Sandstone, southern Sweden" (PDF). Geological Quarterly. 46 (1): 307–320. Retrieved 24 December 2021.
- ^ Mitchell, A. J; Allison, P. A; Gorman, G. J.; Piggott, M. D.; Pain, C. C. (2011). "Tidal circulation in an ancient epicontinental sea: The Early Jurassic Laurasian Seaway". Geology. 39 (3): 207–210. Bibcode:2011Geo....39..207M. doi:10.1130/G31496.1. Retrieved 24 December 2021.
- ^ Augustsson, C. (2001). "Lapilli tuff as evidence of Early Jurassic Strombolian-type volcanism in Scania, southern Sweden". GFF. 123 (1): 23–28. Bibcode:2001GFF...123...23A. doi:10.1080/11035890101231023. S2CID 140544085.
- ^ Pieńkowski, G. (1991). "Eustatically-controlled sedimentation in the Hettangian-Sinemurian (Early Jurassic) of Poland and Sweden". Sedimentology. 38 (3): 503–518. Bibcode:1991Sedim..38..503P. doi:10.1111/j.1365-3091.1991.tb00364.x. Retrieved 12 December 2021.
- ^ Tullberg, S.A. (1880). "Meddelande om nya fynd af musslor i Höörssandsten". Geologiska Föreningen i Stockholm Förhandlingar. 7 (5): 315–317. doi:10.1080/11035898009443938. Retrieved 5 March 2022.
- ^ Jackson, R. T. (1906). "A new species of fossil Limulus from the Jurassic of Sweden". Arkiv för Zoologi. 3 (11): 1–7.
- ^ Bicknell, R. D.; Błażejowski, B.; Wings, O.; Hitij, T.; Botton, M. L. (2021). "Critical re-evaluation of Limulidae uncovers limited Limulus diversity". Papers in Palaeontology. 7 (3): 1525–1556. Bibcode:2021PPal....7.1525B. doi:10.1002/spp2.1352. S2CID 233783546. Retrieved 24 December 2021.
- ^ Heer, O. (1878). "Ueber einige Insektenreste aus der raetischen Formation Schonens". Geologiska Föreningen i Stockholm Förhandlingar. 4 (1): 192–197. doi:10.1080/11035897809446246. Retrieved 12 December 2021.
- ^ Antevs, E. (1919). "Die liassische Flora des Hörsandsteins". Kungliga Svenska Vetenskapsakademiens Handlingar. 59 (1): 524–527. doi:10.1080/11035891909443882. Retrieved 24 December 2021.
- ^ Halle, T. G. (1910). "On the Swedish species of Sagenopteris Presl and of Hydropterangium nov. gen". Kungliga Svenska Vetenskapsakademiens Handlingar. 45 (7): 1–16.
- ^ Pott, C. (2014). "A revision of Wielandiella angustifolia, a shrub-sized bennettite from the Rhaetian-Hettangian of Scania, Sweden, and Jameson Land, Greenland". International Journal of Plant Sciences. 175 (4): 467–499. doi:10.1086/675577. S2CID 83990083. Retrieved 24 January 2022.
- ^ Pott, C.; McLoughlin, S. (2009). "Bennettitalean foliage in the Rhaetian–Bajocian (latest Triassic–Middle Jurassic) floras of Scania, southern Sweden". Review of Palaeobotany and Palynology. 158 (1–2): 117–166. doi:10.1016/j.revpalbo.2009.08.004. Retrieved 24 December 2021.
