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Earth Biosphere History (Ubukata, Geology and Mineralogy) Lab
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A division that reads the evolution of life and the history of the Earth from strata and fossils.
AboutAbout the lab
Strata and fossils carry the history of the Earth.
Over Earth's long history, surface environments have changed, and life has repeatedly gone through extinction and evolution.
The Earth Biosphere History division studies strata and sediments, which cover about 90% of the Earth's surface, and the fossils they contain, with three groups (paleontology, sedimentology, and structural geology) working together.
All of the research places importance on field geological surveys, but it also includes work that re-examines existing samples and data from new perspectives, as well as theoretical and experimental studies.
Key terms
- Fossil
- The remains of the bodies of ancient organisms, or traces of their habitats, preserved in strata
- Sedimentology
- The study of how strata form, used to reconstruct the surface conditions of the past
- Accretionary prism
- A geological body formed when strata scraped off as an oceanic plate subducts are pushed against the landward side
ResearchResearch themes
Studying strata and sediments and the fossils they contain, the lab researches the evolutionary history of ancient organisms, the mechanisms of landform and stratum formation, and the history of crustal deformation.
*Illustrative imageEvolutionary History of Ancient Life
The lab pursues research in evolutionary morphology through analysis of the comparative morphology, functional morphology, and phylogenetic relationships of fossil and living organisms; research on changes in paleobiodiversity through data analysis of fossil occurrence records; and research on methods for analyzing morphology and fossil records.
*Illustrative imageHow Landforms and Strata Form
The lab works on reconstructing changes in depositional systems through fieldwork, elucidating landform development processes through water tank experiments, inverse analysis of the conditions of landform and stratum formation with numerical models, and elucidating sediment transport through observation of present-day depositional processes.
*Illustrative imageHistory of Crustal Deformation
The lab pursues research on the geological history of island arc-trench systems through geological surveys of sedimentary basins and accretionary prisms, elucidation of present-day crustal stress through analysis of earthquake focal mechanisms and active faults, and development of analytical methods to estimate stress, strain, and friction coefficients from geological structures.
MembersFaculty
The members of the Earth Biosphere History division are faculty, researchers, doctoral and master's students, and fourth-year undergraduate students.As of 2026
- ProfessorTakao Ubukata
- ProfessorHajime Naruse
- ProfessorKatsushi Sato
- Assistant ProfessorKazuko Yoshizawa
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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: “Ammonite Pavement” RealGatba / CC0 (cropped)
- Evolutionary History of Ancient Life: “Ammonite section” Tomomarusan / CC BY 2.5 (cropped)
- How Landforms and Strata Form: “Structurally tilted sedimentary rocks (Price Formation, Lower Mississippian; Cloyds Mountain roadcut, Valley Coalfield, Virginia, USA) )” James St. John / CC BY 2.0 (cropped)
- History of Crustal Deformation: “Accretionary Wedge and Forearc” Page Quinton / CC BY-SA 4.0 (cropped)
- Related lab (Earth Tectonics Lab): “Weathered growth rings at Aztec Ruins National Monument” Michael Gäbler / CC BY 3.0 (cropped)
- Related lab (Crustal Physics (Earth Rheology, Shimizu) Lab): “FaultGouge” Qfl247 (talk) (Transferred by Citypeek/Original uploaded by Qfl247) / CC BY-SA 3.0 (cropped)
- Related lab (Kyoto University Museum Lab): “Kyoto University Museum” J o / CC BY-SA 3.0 (cropped)
- Related lab (Geodesy Lab): “GNSS reference station and road to Fivefinger Strand” Rorosyfingers / CC BY-SA 4.0 (cropped)
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