Discovered in the nineteenth century by the Canadian Geological Survey, the Eozoön canadense fossil, or 'dawn animal of Canada', created a sensation in the geological community. Only a few initially challenged its status as a fossil organism, including two professors in the remote Irish town of Galway. These men claimed that Eozoön was nothing more than a mineral formation and did not represent...

Dense ceramic materials can form in nature under mild temperatures in water. By contrast, man-made ceramics often require sintering temperatures in excess of 1,400 °C for densification. Chemical strategies inspired by biomineralization processes have been demonstrated but remain limited to the fabrication of thin films and particles. Besides biomineralization, the formation of dense ceramic-lik...

Teach the Earth: The Science Education Resource Center (SERC) Portal for Geoscience Faculty (Carleton College). This portal is the gateway to thousands of pages of activities, workshops, course descriptions and more http://serc.carleton.edu/teachearth/index.html [1] See the SERC site Bringing Research on Learning to the Geosciences for a searchable database of articles on effective learning and...

Quetzalpetlatl Corona ( 850 km in diameter) and Boala Corona ( 350 km 250 km in diameter), are both situated within the Lada Terra rise, a prominent 2000-km-wide circular topographic feature rising 2.5–3 km above the mean planetary radius in the southern hemisphere of Venus, south of the Lavinia Planitia lowlands. Together these features form a unique configuration that combines the characteris...

CO2 geological storage (CGS) is one of the most promising technologies to address the issue of excessive anthropogenic CO2 emissions in the atmosphere due to fossil fuel combustion for electricity generation. In order to fully exploit the storage potential, numerical simulations can help in determining injection strategies before the deployment of full scale sequestration in saline aquifers. Th...

We propose a new method to measure the (222)Rn concentration in a closed bore-hole and to use the results for estimation of the diffusion parameter and the average radium content of the surrounding geological formations. In a closed bore-hole, only several meters from the surface, the radon concentration is rather constant (in the +/-15% range) under different meteorological conditions. The inf...

Instruction in a constructivist framework involves creating opportunities for learners to integrate new learning about abstract geological ideas with prior science-related experiences, and to apply ideas learned in class to everyday events. But do children readily make these connections? I surveyed 55 sixth grade children about their knowledge of rocks in their local area. Results indicate that...

ABSTRACT: This study provides an analysis of the influence of underground CO2 storage on the effective stress field in a representative geological formation. Large scale finite element models are used to describe the injection process. For high injection rates, different material degradation mechanisms may be activated depending on initial conditions. The case of rock fracturing due to tensile ...

Low carbon steel has been considered a suitable material for component of the multi-barrier system employed on the geological disposal of high-level radioactive waste (HLW). A non negligible amount of dihydrogen (H2) is expected to be produced over the years within the geological repository due to the anoxic corrosion of metallic materials and also to the water radiolysis. The influence of the ...

Salt domes, an important geological structure, are closely related to the formation of petroleum reservoirs. In many cases, no explicit strong reflector exists between a salt dome and neighboring geological structures. Therefore, interpreters commonly delineate the boundaries of salt domes by observing a change in texture content. To stimulate the visual interpretation process, we propose a nov...