Miospore palynology and biostratigraphy of Mississippian strata of the Amazonas Basin, Northern Brazil: part one

Playford, Geoffrey and Melo, Jose Henrique G. (2012) Miospore palynology and biostratigraphy of Mississippian strata of the Amazonas Basin, Northern Brazil: part one. AASP Contributions Series, 47 3-89.

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Author Playford, Geoffrey
Melo, Jose Henrique G.
Title Miospore palynology and biostratigraphy of Mississippian strata of the Amazonas Basin, Northern Brazil: part one
Journal name AASP Contributions Series   Check publisher's open access policy
ISSN 0160-8843
Publication date 2012-12
Sub-type Article (original research)
Volume 47
Start page 3
End page 89
Total pages 87
Place of publication College Station, TX, United States
Publisher American Association of Stratigraphic Palynologists Foundation
Collection year 2013
Language eng
Formatted abstract
Mississippian (Lower Carboniferous) sequences penetrated by numerous hydrocarbon-exploratory wells in
the Amazonas Basin, northern Brazil, contain an abundance and diversity of plant microfossils that are readily
applicable to biostratigraphic analysis, and hence to detailed correlation and age determination of the host strata.
This study, presented in two successive parts, comprises a detailed systematic-descriptive survey of miospore
assemblages preserved in core samples from selected boreholes that intersected and are well representative of
the Mississippian portion of the Oriximiná Formation and of the partly overlying, partly laterally equivalent Faro
Formation. In the current Part One, representatives of trilete miospore taxa featuring relatively simple morphology
(i.e., with acavate/azonate exines, variously sculptured) are described and illustrated. Part Two completes
the systematic analysis of the miospores and details their stratigraphic significance, re-assessing and augmenting
a palynozonal scheme established previously (in 2003).

In this part, 70 species and species groups within the above-stated morpho-taxonomic category are described
and illustrated. They are attributable to 25 genera, one of which – Claytonispora – is established as a new genus
of trilete, distinctively apiculate, acavate miospores. Four new species are proposed: Leiotriletes pachytunicus,
Verrucosisporites gregatus
, Anapiculatisporites semicuspidatus, and Apiculatasporites quadrosii. Additionally, five new
combinations are established: Claytonispora distincta (Clayton, 1971), Claytonispora rarisetosa (Kedo, 1963), Corbulispora
cancellata
(Waltz in Luber & Waltz, 1938), Cordylosporites absimilis (Daemon, 1974), and Cordylosporites glumaceus
(Byvsheva, 1972). The majority of the species are identifiable with species described and named previously from
Mississippian palynofloras of Western and Eastern Gondwana and, in the case of cosmopolitan or nearcosmopolitan
forms, also from Euramerican regions.
Keyword Miospores
Systematic palynology
Amazonas Basin
Mississippian (Lower Carboniferous)
Brazil
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
Official 2013 Collection
 
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Created: Fri, 05 Apr 2013, 12:25:48 EST by Ashleigh Paroz on behalf of School of Earth Sciences