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author = " Geisen, Markus "
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Found 17 documents, displaying page 1 of 2

Xenospheres - associations of coccoliths resembling coccospheres

Author(s) : Young, J. R. , Geisen, Markus
Description : A set of images of xenospheres are presented. These are anomalous coccospheres bearing coccoliths of two or more coccolithophore species. Unlike combination coccospheres, these are almost certainly the products of post mortem processes. Possible mechanisms of formation are discussed, and comparative...
Repository : ePIC
Language(s) : Undetermined

A review of selected aspects of coccolithophore biology with implications for paleobiodiversity estimation

Author(s) : Young, J. R. , Geisen, Markus , Probert, I.
Description :
Repository : ePIC
Language(s) : Undetermined

Stereo-microscopy of coccolithophores - modern applications for imaging and morphological analysis

Author(s) : Andruleit, H. , Geisen, Markus , Stäger, S.
Description :
Repository : ePIC
Language(s) : Undetermined

Coccolithophores for exhibition: A note

Author(s) : Geisen, Markus , Probert, I. , Young, J. R.
Description : When we work with coccolithophores, we sometimes overlook their beauty, strangeness and visual impact. However, recently their visual qualities were amply confirmed, after one of us (MG) spent an afternoon false-colouring an SEM image for a science photography competition: the resultant image won Fi...
Repository : ePIC
Language(s) : Undetermined

Calcium isotope fractionation in coccoliths of cultured Calcidiscus leptoporus, Helicosphaera carteri, Syracosphaera pulchra and Umbilicosphaera foliosa

Author(s) : Gussone, N. , Langer, Gerald , Geisen, Markus , Steel, B. A. , Riebesell, U.
Description :
Repository : ePIC
Language(s) : Undetermined

Determination of absolute coccolith abundances in deep-sea sediments by spiking with microbeads and spraying (SMS-method)

Author(s) : Bollmann, J. , Brabec, B. , Cortés, M. Y. , Geisen, Markus
Description : A quick new method is described for the quantification of absolute nannofossil proportions in deep-sea sediments. Thismethod (SMS) is the combination of Spiking a sample with Microbeads and Spraying it on a cover slide. It is suitablefor scanning electron microscope (SEM) analyses and for light micr...
Repository : ePIC
Language(s) : Undetermined

The significance of extant coccolithophores as indicators of ocean water masses, surface temperature, and palaeoproductivity: a review.

Author(s) : Baumann, K. H. , Andruleit, H. , Böckel, B. , Geisen, Markus , Kinkel, H.
Description :
Repository : ePIC
Language(s) : Undetermined

Light and Electron Microscope Observations of Algirosphaera robusta (Prymnesiophyceae)

Author(s) : Probert, I. , Fresnel, J. , Billard, C. , Geisen, Markus , Young, J. R.
Description :
Repository : ePIC
Language(s) : Undetermined

Potential and limitations of Sr/Ca ratios in coccolith carbonate: new perspectives from cultures and monospecific samples from sediments

Author(s) : Stoll, H. M. , Ziveri, P. , Geisen, Markus , Probert, I. , Young, J. R.
Description : The Sr/Ca ratio of coccoliths was recently proposed as a potential indicator of past growth rates of coccolithophorids, marine algae, which play key roles in both the global carbonate and carbon cycles. We synthesize calibrations of this proxy through laboratory culture studies and analysis of monos...
Repository : ePIC
Language(s) : Undetermined

Calibration of the random settling technique for calculation of absolute abundances of calcareous nannoplankton

Author(s) : Geisen, Markus , Bollmann, J. , Herrle, J. O. , Mutterlose, J. , Young, J. R.
Description : We describe a device for random settling preparation of calcareous nannoplankton (coccolith) samples. The device allows easy draining and cleaning, as well as sedimentation at different heights of the water column through the use of different slide carriers. Reproducibility and accuracy of the devic...
Repository : ePIC
Language(s) : Undetermined
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Found 17 documents, displaying page 1 of 2