A morphogram for silica-witherite biomorphs and its application to microfossil identification in the early earth rock record

A morphogram for silica-witherite biomorphs and its application to microfossil identification in the early earth rock record

Rouillard, J.; Garcia-Ruiz, J. M.; Gong, J.; van Zuilen, M. A., A morphogram for silica-witherite biomorphs and its application to microfossil identification in the early earth rock record. Geobiology 2018. Download paper. Archean hydrothermal environments formed a likely site for the origin and early evolution of life. These are also the settings, however, were complex abiologic structures can form. Low-temperature serpentinization of ultramafic crust can generate alkaline, silica-saturated fluids in which carbonate-silica crystalline aggregates with…

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Structural Transition of Inorganic Silica-Carbonate Composites Towards Curved Lifelike Morphologies

Structural Transition of Inorganic Silica-Carbonate Composites Towards Curved Lifelike Morphologies

Opel, J.; Kellermeier, M.; Sickinger, A.; Morales, J.; Coelfen, H.; Garcia-Ruiz, J.-M., Structural Transition of Inorganic Silica-Carbonate Composites Towards Curved Lifelike Morphologies. Minerals 2018, 8 (2). Download paper. The self-assembly of alkaline earth carbonates in the presence of silica at high pH leads to a unique class of composite materials displaying a broad variety of self-assembled superstructures with complex morphologies. A detailed understanding of the formation process of these purely inorganic architectures is crucial for…

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Beautiful day in the surroundings of Lake Natron

Today we have experienced a beautiful day in the surroundings of Lake Natron, in Tanzania on the border with Kenya. We were able to sample there because it is Masai territory and with our guide Lucas Sozoika we didn’t need a passport. Lucas knows the terrain like the back of his hand because, among other things, he brings from Magadi the chlorine tablets that allow them to make the water of the Ewaso Ngi’ro River…

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Marshland of Orgarua

When the river Ewaso Ng’iro (Brown River) overflows, it creates a marshland in this idyllic place called Orgarua. The mountain on the left is the Shompole. Behind it, Tanzania. Cuando el rio Ewaso Ng'iro (Río Marrón) se desborda crea una marisma en este idílico lugar llamado Orgarua. La montaña a la izquierda es el Shompole. Detras de ella Tanzania. Posted by Explaining Prometheus-ERC on Sunday, March 25, 2018    

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Ephemeral currents

Unlike Lake Natron, Lake Magadi has neither affluents nor effluents. There is no water current coming in or out. It rains a few hours a year. To catch one of those days when ephemeral currents are formed was a gift. Primer muestreo en Magadi: El Arroyo seco. A diferencia del lago Natron, el lago Magadi no tiene ni afluentes ni efluentes. Aqui no llega ni sale ninguna corriente de agua. Llueve escasas horas al año….

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