Results 21 to 30 of about 13,660 (208)

The calcareous nannofossils and magnetostratigraphic results from the Upper Tithonian-Berriasian of Feodosiya region (Eastern Crimea) [PDF]

open access: yes, 2019
This article is concerned with nannofossil study of Tithonian-Berriasian sediments of Eastern Crimea. The NJT 16, NJT 17a, NJT 17b, NKT, and NK 1 nannofossil zones were determined. The occurrence of Nannoconus kamptneri minor, one of the potential marker-
Arkadiev, V.   +4 more
core   +1 more source

Sedimentary Environments and Age Determination of the Chia Gara Formation, Northern Iraq

open access: yesIraqi Geological Journal, 2023
The rock successions of the Chia Gara Formation were studied at two surface sections (Barsarin and Rania) from North-Eastern Iraq. The detailed sedimentological study reveals that the formation consists basically of thin-bedded black limestone ...
Ameen Al-Mansoor   +2 more
doaj   +1 more source

A new type of shell malformation caused by epizoans in Late Jurassic ammonites from Central Russia [PDF]

open access: yesActa Palaeontologica Polonica, 2016
A new type of shell damage on Late Jurassic ammonite Kachpurites fulgens is described. The new type of shell malformation consists of small elongated pits, arranged in groups on the surface of ammonite shell and concentrated near the terminal aperture ...
Aleksandr A. Mironenko
doaj   +1 more source

Mineral composition and structural features of jewelry ammonites from mine OJSC «Mikhailovcement», Ryazan region

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2019
For the first time, the mineral composition and structural features of jewelry ammonite from mine OJSC «Mikhailovcement» in Ryazan Region are studied in detail. Ammonites are associated with sediments of Callovian and Oxfordian stages.
D. A. Petrochenkov, A. V. Petrov
doaj   +1 more source

MINERAL COMPOSITION AND STRUCTURAL FEATURES OF JEWELER AMMONITES FROM KOSTROMA REGION

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2017
Detailed mineralogical examination of ammonites of jewelry quality has been carried out by means of radiographical, X-ray microanalyses and electronic microscopy.
D. A. Petrochenkov
doaj   +1 more source

Calcareous nannofossil and ammonite integrated biostratigraphy across the Jurassic – Cretaceous boundary strata of the Kopanitsa composite section (West Srednogorie Unit, southwest Bulgaria)

open access: yesGeologica Carpathica, 2018
Calcareous nannofossil, calpionellid and ammonite occurrences have been directly constrained across the Jurassic–Cretaceous boundary interval in the section of Kopanitsa, SW Bulgaria.
Stoykova Kristalina   +3 more
doaj   +1 more source

Toarcian oceanic anoxic event: An assessment of global causes using belemnite C isotope records [PDF]

open access: yes, 2005
Two hypotheses have been proposed to explain simultaneous large negative excursions (up to 7% PeeDee belemnite) in bulk carbonate (delta(13)C(carb)) and organic carbon isotope records (delta(13)C(org)) from black shales marking the Toarcian oceanic ...
Bailey, TR   +5 more
core   +1 more source

Early Cretaceous ammonites and dinoflagellates from the Western Tatra Mountains, Poland [PDF]

open access: yesActa Palaeontologica Polonica, 2020
The first Early Cretaceous (Valanginian–Hauterivian) ammonite fauna from the lower part of the Kościeliska Marl Formation (Wściekły Żleb Member) of the Lower Sub-Tatric (Krížna) Nappe, in the Lejowa Valley of the Tatra Mountains are described.
Zdeněk Vašíček   +6 more
doaj   +1 more source

What happened to Kemosh? [PDF]

open access: yes, 2016
What happened to Kemosh in the era after Moab’s loss of political independence? The present article first argues that this question is of interest to scholarship on the Hebrew Bible because Kemosh and Yhwh were initially twinlike: both were patron ...
Collin Cornell
core   +1 more source

CALIBRATION OF THE PLIENSBACHIAN-TOARCIAN CALCAREOUS NANNOFOSSIL ZONE BOUNDARIES BASED ON AMMONITES (BASQUE-CANTABRIAN AREA, SPAIN)

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2004
Based on a continuous succession of ammonite and calcareous nannofossil assemblages, the main purpose of this paper is the correlation between ammonite and calcareous nannofossil zone boundaries in two expanded sections from the Basque-Cantabrian area ...
NICOLA PERILLI   +2 more
doaj   +1 more source

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