GeoLog

Ocean Sciences

Geosciences Column: Stitching the seafloor together

You’re standing on a mountain peak, with a fabulous field site before you. Wanting to capture the moment, you take out your iPhone, snap a dozen pictures and your mobile stitches them together beautifully – a nice record to show your colleagues back in the office. Unfortunately, not all field sites are so easy to capture – especially when you need to do a little science with the images. Seafloor p ...[Read More]

Imaggeo on Mondays: The perfect partnership

Pogonophores are deep sea worms that thrive in dark, deep sea conditions thanks to the presence of symbiotic bacteria. The bacteria are chemoautotrophic, that is, they fix carbon through oxidation processes, rather than using light to fix it, as is the case for photosynthesis. By utilising oxygen in the water, the bacteria can oxidise compounds such as hydrogen sulphide in order to fix carbon. The ...[Read More]

Geosciences Column: Dating a bivalve

Just as the rings on a tree can be used to determine its age, the bands on a bivalve’s shell can tell us the how long it’s been around for. Warm, food-filled waters lead to greater growth in the summer and low plankton abundance (the principle food source for filter-feeding molluscs) leads to limited growth during the winter months – hence the banding. But pinning down the age of a bivalve m ...[Read More]

Imaggeo on Mondays: A clash of hard and soft landscapes

This week’s Imaggeo on Mondays is brought to you by the photographer himself, who describes the striking scenery of the Conwy estuary in Wales… After a workshop with salt-marsh specialists in Conwy (Wales, UK), I stayed a couple of days to explore the surroundings. Living and working in The Netherlands, for me intertidal areas are typically wide, flat expanses of land, where the horizon is far awa ...[Read More]