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Palynostratigraphy of the Triassic-Jurassic transition in southern Sweden

Larsson, Linda LU (2009) In GFF 131(1-2). p.147-163
Abstract
Palynological samples from Upper Triassic and Lower Jurassic exposures and borehole sections of the Hoganas and Rya formations (Fm), NW Skane (Sweden), exhibit diverse and generally well-preserved palynomorph assemblages that can be divided into four miospore zones (from bottom to top): (1) the informal "Topmost upper Rhaetian" zone of Lund; (2) the TSI assemblage zone which spans the Triassic-Jurassic (T-J) boundary; (3) the Hettangian Pinuspollenites-Trachysporites Zone and (4) the Sinemurian Cerebropollenites macroverrucosus Zone. Uppermost Rhaetian and T-J boundary strata have previously been considered to be absent in Skane, but are identified palynologically in all but one (Kulla-Gunnarstorp) section in this study. The palynological... (More)
Palynological samples from Upper Triassic and Lower Jurassic exposures and borehole sections of the Hoganas and Rya formations (Fm), NW Skane (Sweden), exhibit diverse and generally well-preserved palynomorph assemblages that can be divided into four miospore zones (from bottom to top): (1) the informal "Topmost upper Rhaetian" zone of Lund; (2) the TSI assemblage zone which spans the Triassic-Jurassic (T-J) boundary; (3) the Hettangian Pinuspollenites-Trachysporites Zone and (4) the Sinemurian Cerebropollenites macroverrucosus Zone. Uppermost Rhaetian and T-J boundary strata have previously been considered to be absent in Skane, but are identified palynologically in all but one (Kulla-Gunnarstorp) section in this study. The palynological assemblages characterise continental deposition with intermittent marine influences. The presence of well-preserved miospores in nearly all assemblages indicates minimal transport during dispersal and deposition. The T-J transition is characterised by a spore-spike, not previously recognised in T-J assemblages of Skane. However, the upper Hettangian and Sinemurian assemblages of this study are similar in composition to coeval palynofloras derived from sediments deposited in paralic environments elsewhere in Skane and Denmark. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Sweden, Skane, zone, Cerebropollenites macroverrucosus, Pinuspollenites-Trachysporites zone, spore-spike, palynology, Triassic-Jurassic boundary
in
GFF
volume
131
issue
1-2
pages
147 - 163
publisher
Geological Society of Sweden
external identifiers
  • wos:000269693400010
  • scopus:70450241524
ISSN
2000-0863
DOI
10.1080/11035890902924828
language
English
LU publication?
yes
id
97cbfc05-7327-4492-9b9a-34030b089267 (old id 1492366)
date added to LUP
2009-10-16 16:30:31
date last changed
2017-07-02 03:42:11
@article{97cbfc05-7327-4492-9b9a-34030b089267,
  abstract     = {Palynological samples from Upper Triassic and Lower Jurassic exposures and borehole sections of the Hoganas and Rya formations (Fm), NW Skane (Sweden), exhibit diverse and generally well-preserved palynomorph assemblages that can be divided into four miospore zones (from bottom to top): (1) the informal "Topmost upper Rhaetian" zone of Lund; (2) the TSI assemblage zone which spans the Triassic-Jurassic (T-J) boundary; (3) the Hettangian Pinuspollenites-Trachysporites Zone and (4) the Sinemurian Cerebropollenites macroverrucosus Zone. Uppermost Rhaetian and T-J boundary strata have previously been considered to be absent in Skane, but are identified palynologically in all but one (Kulla-Gunnarstorp) section in this study. The palynological assemblages characterise continental deposition with intermittent marine influences. The presence of well-preserved miospores in nearly all assemblages indicates minimal transport during dispersal and deposition. The T-J transition is characterised by a spore-spike, not previously recognised in T-J assemblages of Skane. However, the upper Hettangian and Sinemurian assemblages of this study are similar in composition to coeval palynofloras derived from sediments deposited in paralic environments elsewhere in Skane and Denmark.},
  author       = {Larsson, Linda},
  issn         = {2000-0863},
  keyword      = {Sweden,Skane,zone,Cerebropollenites macroverrucosus,Pinuspollenites-Trachysporites zone,spore-spike,palynology,Triassic-Jurassic boundary},
  language     = {eng},
  number       = {1-2},
  pages        = {147--163},
  publisher    = {Geological Society of Sweden},
  series       = {GFF},
  title        = {Palynostratigraphy of the Triassic-Jurassic transition in southern Sweden},
  url          = {http://dx.doi.org/10.1080/11035890902924828},
  volume       = {131},
  year         = {2009},
}