Geochemistry and correlation of volcanic ash beds from the Rootsiküla Stage (Wenlock–Ludlow) in the eastern Baltic [PDF]
Estonian Journal of Earth Sciences, 2011 Nine altered volcanic ash samples from the shoal and lagoonal sediments of the Rootsiküla Stage (Wenlock–Ludlow boundary interval, Estonia) were analysed, compared and correlated with five samples of deep sea environments from Latvia.
Tarmo Kiipli +5 more
doaj +1 more source
Palynomorphs from abra límite, zenta range, Eastern Cordillera, Northwestern Argentina [PDF]
, 2010 This study presents the first Devonian palynological record in the Zenta Range in Eastern Cordillera, Argentina. Two associations were recognized on the basis of differences in palynomorphs and palynofacies.
Di Pasquo Lartigue, Maria +1 more
core +1 more source
A summary and revision of the East Baltic Silurian chitinozoan biozonation [PDF]
Estonian Journal of Earth Sciences, 2012 The biostratigraphical data on the East Baltic Silurian chitinozoans are summarized. Based on the study of nine East Baltic drill cores, 28 regional chitinozoan zonal units, including 26 biozones and 2 interzones, are briefly characterized. In comparison
Viiu Nestor
doaj +1 more source
An in situ shelly fauna from the lower Paleozoic Zapla diamictite of northwestern Argentina: implications for the age of glacial events across Gondwana [PDF]
, 2015 A shelly fauna from the upper part of the Zapla glacial diamictite includes thelingulate brachiopod Orbiculoidea radiata Troedsson, the rhynchonelliforms Dalmanella cf. testudinaria (Dalman) and Paromalomena sp., the bivalve Modiolopsis?
Benedetto, Juan Luis Arnaldo +3 more
core +2 more sources
Darriwilian (Middle Ordovician) conodont biostratigraphy in NW Estonia [PDF]
Estonian Journal of Earth Sciences, 2012 Darriwilian conodonts have been studied in numerous sections of Baltoscandia, but few data are available from the classical outcrop area in northern Estonia. In this paper we report the succession of Darriwilian conodonts and chitinozoans from the bed-by-
Olle Hints, Viive Viira, Jaak Nõlvak
doaj +1 more source
Paleoceanography and Paleoclimatology, Volume 35, Issue 12, December 2020., 2020 Abstract Variations in depositional rates affect the temporal depositional resolutions of proxies used for paleoenvironmental reconstructions; for example, condensation can make reconstructed environmental changes appear very abrupt. This is commonly addressed by transforming proxy data using age models, but this approach is limited to situations where
E. Jarochowska +5 more
wiley +1 more source
EARLY LLANDOVERY CHITINOZOANS FROM JORDAN [PDF]
Palaeontology, 2009 Abstract: Chitinozoans recovered from cores BG‐14 and WS‐6 in southern and eastern Jordan are described. Sample ages are well‐constrained by graptolite data to the ascensus‐acuminatus and vesiculosus graptolite biozones. Eighteen chitinozoan taxa are recognized, with Spinachitina fragilis, Plectochitina nodifera, Ancyrochitina laevaensis and ...
openaire +2 more sources
A Cenozoic-style scenario for the end-Ordovician glaciation [PDF]
, 2014 The end-Ordovician was an enigmatic interval in the Phanerozoic, known for massive glaciation potentially at elevated CO2 levels, biogeochemical cycle disruptions recorded as large isotope anomalies and a devastating extinction event.
Achab, A +10 more
core +8 more sources
A modern assessment of Ordovician chitinozoans from the Shelve and Caradoc areas, Shropshire, and their significance for correlation [PDF]
, 2009 New chitinozoan data are presented from the classical section along the Onny River in the type Caradoc area, and from the deeper-water sections in the Shelve area, including the former British candidate GSSP for the base of the Upper Ordovician Series ...
Achab +23 more
core +2 more sources
Possible metazoan egg fossils from the Darriwilian (Middle Ordovician) of Baltoscandia [PDF]
Estonian Journal of Earth Sciences, 2021 The Baltoscandian lower Palaeozoic succession is well known for the abundance, diversity and excellent preservation of various groups of microfossils, such as acritarchs, chitinozoans, scolecodonts and conodonts.
Olle Hints, Jaak Nõlvak, Yan Liang
doaj +1 more source