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Paleoenvironmental Change and Evolutionary Paleontology Lab
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A lab that reconstructs past global environments from biological skeletons, shells, and sediments.

AboutAbout the lab
Reading past environmental change from shells and sediments.
The Paleoenvironmental Change and Evolutionary Paleontology Lab reconstructs past Earth surface environments from the skeletons and shells of corals, bivalves, brachiopods, and other organisms, as well as from carbonate sediments.
Using methods from paleontology, sedimentology, and geochemistry, the lab investigates environmental change over a variety of timescales.
Behind the research is the view that, to predict how the Earth as a whole will respond to rapidly advancing global warming, it is necessary to reconstruct past environmental changes and clarify their causal relationships.
On the lab's website, it is introduced under the name "Carbonate Sedimentology and Geochemistry Group."
Key terms
- Carbonate sediments
- Sediments composed mainly of carbonates such as calcium carbonate. This lab mainly deals with coral reef sediments
- Quaternary
- A geological period in which the expansion and contraction of ice sheets repeatedly caused warming and cooling and rises and falls in sea level
- Coral reef front
- The positions of the northern and southern limits of where coral reefs are distributed. They are thought to have shifted when climate and ocean conditions changed
ResearchResearch themes
Biological skeletons and shells made of carbonate, and carbonate sediments (mainly coral reef sediments), are a type of paleoclimate archive that records Earth's environmental changes over various timescales in detail. Using methods from paleontology, sedimentology, and geochemistry, the lab reconstructs past changes in Earth's surface environment from these records.
View More ↗MembersFaculty
The members introduced on the lab's website are faculty, research support staff, and doctoral, master's, and undergraduate students.As of 2023
- ProfessorYasufumi Iryu
- Associate ProfessorRyuji Asami
- Associate ProfessorHideko Takayanagi
- Assistant ProfessorTsutomu Yamada
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Envisat image of the Great Barrier Reef off Australia's Queensland coast ESA233136” European Space Agency / CC BY-SA 3.0 igo (cropped)
- Reconstructing the shifts of the coral reef front: “Coral reef of Tonaki Island 202407” Kugel~commonswiki / CC BY-SA 4.0 (cropped)
- Related lab (Geology and Paleoceanography Lab): “Kilve Beach Rock Formation - geograph.org.uk - 229528” Rob Farrow / CC BY-SA 2.0 (cropped)
- Related lab (Natural Disaster Science Lab): “Fault scarp a Quake Lake 19970627” Jstuby / CC0 (cropped)
- Related lab (Crustal Evolution Lab): “Photomicrograph of rock thin section Gabbroic inclusion” Christopher Nye / Public domain (cropped)
- Related lab (Geomorphology and Physical Geography Lab): “Sydney (AU), Coastal Cliff Walk” Dietmar Rabich / CC BY-SA 4.0 (cropped)
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