Results 51 to 60 of about 2,938 (213)
Photoassociation of Trilobite Rydberg Molecules via Resonant Spin-Orbit Coupling [PDF]
, 2017 We report on a novel method for the photoassociation of strongly polar trilobite Rydberg molecules. This exotic ultralong-range dimer, consisting of a ground-state atom bound to the Rydberg electron via electronneutral scattering, inherits its polar ...
Kleinbach, K. S. +14 more
core +1 more source
Journal of Raman Spectroscopy, EarlyView.Micrometer analysis of millimeter lines of Raman spectra concludes in the association of anatase and graphitized organic matter (graphogen). The photosynthetic microorganisms at the origin of the microbialites produce O2, which is transformed by TiO2 into reactive species that, in turn, decompose the organic matter of the microorganisms. ABSTRACT Raman
Marie‐Paule Bassez
wiley +1 more source
An electron backscatter diffraction study of geesops: a broader view of trilobite vision? [PDF]
, 2008 The calcite eyes of trilobites have been studied for over 100 years using methods including light microscopy (e.g. Clarke 1889; Campbell 1975; Towe 1973; Clarkson 1979 and Bruton and Haas 2003) and more recently cathodoluminescence (CL) imaging coupled ...
Torney, C., Lee, M.R., Owen, A.W.
core
, 2022 The effects of sea-level changes and anoxia on Devonian trilobites have been studied for a long time, but the importance of palaeogeographic and tectonic events in this key-period is still not well understood.
Bignon, Arnaud Marcel Jacques +3 more
core +1 more source
Meteoritics &Planetary Science, EarlyView.Abstract The Tvären structure in southeastern Sweden has been listed as a confirmed marine‐target impact structure for decades. However, to date, no measurements and/or indexed data of planar deformation features in quartz grains from the structure have been published or any other unequivocal evidence of impact.
Katarzyna J. Gajewska +6 more
wiley +1 more source
, 2019 Bilderstapel erzeugt mit Synchroton und micro-CT von Augen zweier zwei Trilobitenarten.Image stacks (synchroton, micro-CT) of the eyes of two trilobite ...
Staude, Andreas +2 more
core +1 more source
Chronostratigraphic Subdivision of the Cambrian of China
Geologica Acta, 2003 The chronostratigraphic framework for the Cambrian of South China is reviewed. Currently four series and nine stages are recognized. The Cambrian of South China is subdivided into one pre-trilobite-bearing series, the Diandongian Series, and three ...
Sanchi Peng
doaj +1 more source
Revisiting the Hummeln structure, Sweden—A shallow marine Cambrian impact structure
Meteoritics &Planetary Science, EarlyView.Abstract Hummeln is a simple impact structure located in south‐eastern Sweden. It is approximately 1.2 km in diameter and almost completely covered by a lake. Here, we present the first detailed investigation of impactites and mapping of the 164.25 m deep drill core Hummeln‐1 with a focus on impact metamorphism and the impact process.
S. Alwmark +8 more
wiley +1 more source
Sedimentology, EarlyView.ABSTRACT Filamentous, anastomosing spar‐filled networks in Phanerozoic carbonates have been interpreted as the mineralised remains of keratose (non‐spiculate) sponges, yet their recognition remains contested because fabrics of broadly similar appearance may arise from microbial, diagenetic or physical processes. This study combines direct fossil–modern
Jeong‐Hyun Lee +2 more
wiley +1 more source
Trilobite palaeobiology and substrate relationships
, 1985 A model suggesting that the trilobite carapace served primarily as a tight hood, under which sandy sediment could be processed for food, is consistent with morphological and ichnological data.
A. Seilacher
core +1 more source