We have a new paper in Science Advances on seasonal movements of the sub-Arctic seafloor. Using sub-annual bathymetry, porewater data, and moored sensors, we observed the seabed expanding and contracting through freeze–thaw cycles, forming seasonal frost blisters. doi.org/10.1126/scia...

📣The May issue of CJES is now LIVE. 📃Featuring: "Holocene earthquake-triggered submarine landslides and turbidites in western Baffin Bay" by @sedialex.bsky.social et al. cdnsciencepub.com/doi/full/10.... 📸Fig 1. Study sites in western Baffin Bay. #marine #landslide #geosky #earthquake #geoscience

Our new study out in G-cubed, wrapping up 8 years of repeat seafloor mapping, flow monitoring, and sediment coring in a glacierized fjord. We made some interesting discoveries about how glaciers, turbidity currents, and submarine landslides interact in these dynamic environments tinyurl.com/49xms8hr

Ooooh new paper from @sedialex.bsky.social that is going to go right to the top of my pile of papers to read! 🧪⚒️ "Processes and Products of Turbidity Currents and Submarine Landslides in a Glacierized Fjord (Southwind Fjord, Baffin Island)" agupubs.onlinelibrary.wiley.com/doi/full/10....

Elisabeth Steel (Queen's U.) and I invite you to submit abstracts on clastic marine sedimentology. Our session aims to connect marine sedimentologists working on modern, experimental, and ancient depositional systems, bridging the gap between these fields. Deadline for abstract submission: Feb. 16!

Just like the 1929 earthquake was recorded in marine sediments offshore Atlantic Canada, the 1933 earthquake triggered a turbidite in Baffin Bay. Sediment cores from the region suggest other large earthquakes occurred during the late Holocene. Stay tuned for our upcoming paper on the subject

The earthquake triggered a submarine landslide and turbidite recorded in marine sediments offshore Atlantic Canada. We know other very large landslides occurred during the last 4,000 years thanks to marine sediment cores collected in the deep waters of eastern Canada

These same sediment cores being analyzed through a CT-Scan and a μCT-Scan to reconstruct the past history of the region

How is marine geoscience conducted at the Geological Survey of Canada? Here are some of the tools we use to characterize the seafloor and monitor seabed processes, in collaboration with our partners from academia and other government departments.

We deployed an autonomous underwater vehicle and 3 moorings in Shortland Canyon, eastern Canada, from the RRS Discovery. Sediment cores were also recovered from the canyon bottom. These data will allow us to understand the physical oceanography and seabed processes in eastern Canadian canyons.

A few years ago, I created animations to illustrate how geological sampling and surveys are conducted at sea. Here are two examples: 1) piston coring to collect long sediment cores 2) multibeam surveys to create maps of the seafloor. Animations are available here: sites.google.com/view/normand...