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Sedimentology of the Bajocian Fuglunda Member at Eriksdal, Scania, southern Sweden

Olsson, Ingela (1996) In Dissertations in Geology at Lund University
Department of Geology
Abstract
The Bajocian Fuglunda Member of Eriksdal consists mostly of sand, silt and coal arranged
in cycles (2-4m). Each cycle generally starts with organic-rich heteroliths at the base and further
up ripple-drift cross laminated and horizontally laminated fine sand follow. The coal seams at
the top of the cycles are of minor thickness. Signs of soil formation occur as coalified rootlets
reaching down from the seams, and as soil horizons with upper erosive boundaries. Evidence
of lacustrine as well as brackish and marine conditions are represented in the strata. The coal
seams contain a flora of fresh water plants, whereas pyrite nodules, Diplocraterion and
calcareous foraminifera are characteristics of brackish or marine conditions. The... (More)
The Bajocian Fuglunda Member of Eriksdal consists mostly of sand, silt and coal arranged
in cycles (2-4m). Each cycle generally starts with organic-rich heteroliths at the base and further
up ripple-drift cross laminated and horizontally laminated fine sand follow. The coal seams at
the top of the cycles are of minor thickness. Signs of soil formation occur as coalified rootlets
reaching down from the seams, and as soil horizons with upper erosive boundaries. Evidence
of lacustrine as well as brackish and marine conditions are represented in the strata. The coal
seams contain a flora of fresh water plants, whereas pyrite nodules, Diplocraterion and
calcareous foraminifera are characteristics of brackish or marine conditions. The different
sediments were divided into two populations interpreted as originating from mainly river
generated and beach foreshore processes. The cyclic arrangement of the present sediments and
their characteristics point at a lower delta plain environment, where sediments were deposited
from the distributaries into the interdistributary bays. Fluctuations in sea-level, possibly due to
variations in the campaction of underlying sediments, periodically exposed the bays to basinal processes. (Less)
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author
Olsson, Ingela
supervisor
organization
year
type
H1 - Master's Degree (One Year)
subject
keywords
Bajocian, Fuglunda Member, coal, cyclicity, grain size analysis, river processes, beach foreshore processes, interdistributary bays, lower deltaic plain
publication/series
Dissertations in Geology at Lund University
report number
68
language
English
id
2369915
date added to LUP
2012-03-09 10:20:43
date last changed
2012-10-23 10:50:46
@misc{2369915,
  abstract     = {The Bajocian Fuglunda Member of Eriksdal consists mostly of sand, silt and coal arranged
in cycles (2-4m). Each cycle generally starts with organic-rich heteroliths at the base and further
up ripple-drift cross laminated and horizontally laminated fine sand follow. The coal seams at
the top of the cycles are of minor thickness. Signs of soil formation occur as coalified rootlets
reaching down from the seams, and as soil horizons with upper erosive boundaries. Evidence
of lacustrine as well as brackish and marine conditions are represented in the strata. The coal
seams contain a flora of fresh water plants, whereas pyrite nodules, Diplocraterion and
calcareous foraminifera are characteristics of brackish or marine conditions. The different
sediments were divided into two populations interpreted as originating from mainly river
generated and beach foreshore processes. The cyclic arrangement of the present sediments and
their characteristics point at a lower delta plain environment, where sediments were deposited
from the distributaries into the interdistributary bays. Fluctuations in sea-level, possibly due to
variations in the campaction of underlying sediments, periodically exposed the bays to basinal processes.},
  author       = {Olsson, Ingela},
  keyword      = {Bajocian,Fuglunda Member,coal,cyclicity,grain size analysis,river processes,beach foreshore processes,interdistributary bays,lower deltaic plain},
  language     = {eng},
  note         = {Student Paper},
  series       = {Dissertations in Geology at Lund University},
  title        = {Sedimentology of the Bajocian Fuglunda Member at Eriksdal, Scania, southern Sweden},
  year         = {1996},
}