- published: 27 Apr 2015
- views: 3907
Calcareous oozes; carbonate saturation, lysocline, and CCD; siliceous oozes, chert, and diatomite; abyssal red clay
Senior technician and laboratory manager Mike Hall describes work pioneered with Nick Shackleton on the use of mass spectrometers to determine climate change from deep sea sediment cores, containing shells of foraminifera. For more audio and video interview extracts from Mike Hall, visit the Voices of Science website: www.bl.uk/voices-of-science/interviewees/mike-hall.
From glacial highs, to abyssal lows, this episode explores the many sedimentary environments and their rock forms.
Agnostic Rhythm: Deep-Cut Grooves & Low-Slung Soul -----SUBSCRIBE----- Losoul — Sediments Losoul — Imminent EP Label: Another Picture — APP-00 Format: 12”, EP http://www.discogs.com/Losoul-Immanent-EP/release/6186496 Support the Artist - Buy the Music Soundcloud, for Agnostic Mixes: http://soundcloud.com/agnostic-rhythm Hearthis, for Agnostic Mixes: https://hearthis.at/agnostic-rhythm Facebook: https://www.facebook.com/Agnostic.Rhythm?ref=tn_tnmn * If you are the copyright holder and would like this video removed, please contact me directly and I will be pleased to do so. All recordings @128kbps.
Autocyclic vs. allocyclic fan processes; effects of sediment supply and source region on fan geometry; contourite deposits
River Geomorphology Video created by Little River Research and Design, with funding from the Missouri Department of Natural Resources. http://serc.carleton.edu/details/files/19075.html As the clip opens you see shallow flow with uniform bedmaterial transport throughout. A small low head wier or dam is installed. This produces deep subcritical flow above the dam and critical flow over it. Below the dam we see supercritical flow. The deeper, low velocity flow above the dam cannot move the coarse bedload (Q = VA, and since A is greatly increased and Q is unchanged above the dam, V is greatly decreased) and we see deposition occur until depth is shallow enough (and A small enough) that the increase in V moved bedload again. Deposition occurs to the top of the dam. When the dam is in...
Seafloor sediment coring (water depth: ~200 m)
Nautilus Live website: http://nautiluslive.org Nautilus Live on Facebook: http://facebook.com/NautilusLive In this highlight video from August 5th, 2011, watch as the ROV Hercules takes sediment core samples in the Black Sea near Sinop, Turkey.
Extreme Journey to the center of the Earth - Scientific drilling into the Earth is a way for scientists to probe the Earth's sediments, crust, and upper mantle. In addition to rock samples, drilling technology can unearth samples of connate fluids and of the subsurface biosphere, mostly microbial life, preserved in drilled samples. Most of the technology used for drilling come from advances in the oil and gas industry. Scientific drilling is carried out on land by the International Continental Scientific Drilling Program (ICDP) and at sea by the Integrated Ocean Drilling Program (IODP). Scientific drilling on the continents includes drilling down into solid ground as well as drilling from small boats on lakes. Sampling thick glaciers and ice sheets to obtain ice cores is related but will n...
Over 50 sediment cores have been obtained from the seabed in and outside Petermann Fjord, Greenland, during the expedition Petermann 2015. Martin Jakobsson from Stockholm University, explains how to use multicorer, pistoncorer and gravitycorer to retrieve sediment cores from the sea floor. Music: et_ – Kopeika (CC BY-NC-SA 3.0) http://www.vyvch.com/ http://creativecommons.org/licenses/by-nc-sa/3.0/
Science for the Public www.scienceforthepublic.org "Working Science" mini-documentaries October 2014: Richard Murray, PhD, Boston University and National Science Foundation. Dr. Murray discusses what ocean sediment cores reveal about millions of years of Earth's climate. He explains how the drilling, loading, and analysis of the sediment cores. Dr. Murray is a leader in international research expeditions and the images in this video are mostly from one of his recent ones to obtain cores related to sediments from Asian monsoon system.
Mr. Lima discusses the sources of oceanic sediments
LEARN (Live Education Activity Resource Network) with AGU: In this video, Dr. Lawrence Krissek from Ohio State University shows us how students will explore climate history via marine sediments using core photos and authentic datasets in an inquiry-based approach. For more information, see: http://education.agu.org/teachers/learn-with-agu/ All video produced and edited by AGU. Graphics by: http://videohive.net/: Music by: http://audiojungle.net
http://gallery.usgs.gov/videos/534 Geologists rely on information from deep beneath the Earth's surface to reconstruct the past. As sediments accumulate over time, they create records geologists use to understand Earth history and to predict future processes and trends. The most common way to get this information is to drill a hole in the Earth where sediments have been deposited over time. The type of drilling tool used for cores depends on how deep and how hard the sediments are. Vibracoring is one of the tools used in shallow coastal areas where sediments consist of soft sand and mud. This video podcast describes how cores are collected in shallow water from the deck of a research vessel using vibracoring. The sediments drilled are recovered in the form of a core that will contain an i...
In a surprise finding, undersea hot lava is baking ocean sediments and releasing greenhouse gases. http://news.discovery.com/earth/deep-sea-lava-climate.html THE GIST * Lava injected into deep sea sediments is baking sediments and driving out greenhouse gases. * The discovery reverses what was thought of as a carbon sink into a carbon source. * Ancient versions of the same situation have been blamed for past global climate changes. One of the places where Nature was thought to suck up and bury atmospheric carbon may actually be doing just the opposite, according to new research on the volcanics of deep-sea ridges. Seismic profiles of the rifting Guaymas Basin in the Gulf of California show molten rock from a deep-sea ridge squeezing far and wide as "sills" of magma into th...