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Three million years of monsoon variability over the northern Sahara
Abstract We present a 3 million year record of aeolian dust supply into the eastern Mediterranean Sea, based on hematite contents derived from magnetic properties of sediments from Ocean DrillingExpand
Detection of noninteracting single domain particles using first-order reversal curve diagrams
We present a highly sensitive and accurate method for quantitative detection and characterization of noninteracting or weakly interacting uniaxial single domain particles (UNISD) in rocks andExpand
Ultrastructural analysis of a putative magnetoreceptor in the beak of homing pigeons
The subcellular organization of afferent trigeminal terminals in the upper beak of the homing pigeon, Columba livia, which are about 5 μm in diameter and contain superparamagnetic magnetite (SPM) crystals was investigated. Expand
Why are geomagnetic excursions not always recorded in sediments? Constraints from post-depositional remanent magnetization lock-in modelling
Abstract Many geomagnetic excursions have been documented during the Brunhes Chron. However, high-resolution paleomagnetic studies of sediments often provide evidence of few (if any) excursions. WeExpand
Late Miocene "washhouse" climate in Europe
Abstract We present two eight-million year long proxy records of precipitation for Southwest and Central Europe, covering the middle to late Miocene (5.3–13 Ma) at a temporal resolution of about 60Expand
Miocene precipitation in Europe: Temporal trends and spatial gradients
article i nfo It is known from present-day climates that both temporal and spatial variations in precipitation can be more pronounced than those in temperature and thus influence ecosystems and humanExpand
Superparamagnetic Magnetite in the Upper Beak Tissue of Homing Pigeons
Neither electron-microscopic nor magnetic measurements revealed any single-domain magnetite in the upper-beak skin tissue of homing pigeons, but complementary low-temperature magnetic measurements confirm the microscopic observations of fine-grained superparamagnetic particles in the tissue. Expand
Magnetic blocking temperatures of magnetite calculated with a three‐dimensional micromagnetic model
We present an analysis of thermal stability of magnetic remanence in fine grains of magnetite (grain size d = 15–120 nm). In order to model incoherent transitions between single-domain (SD) andExpand
Rock magnetic properties of uncultured magnetotactic bacteria
Abstract Understanding the magnetic properties of magnetite crystals (Fe3O4) produced by magnetotactic bacteria (MTBs) is of fundamental interest in fields of geosciences, biomineralization, fineExpand
Chains of magnetite crystals in the meteorite ALH84001: Evidence of biological origin
Although it is unlikely that magnetotactic bacteria were ever alive in ALH84001, decomposed remains of such organisms could have been deposited in cracks in the rock while it was still on the surface on Mars. Expand