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March 25, 2026BULLETIN OF THE GEOLOGICAL SURVEY OF JAPANOpen Access

Trace fossils in rock used as building material on the Hongo Campus of the University of Tokyo

Koji SEIKE Masayuki Ikeda

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Key Points

The aim is to identify and report the presence of trace fossils in buildings within the University of Tokyo's Hongo Campus.
Examined building stones used in structures like Yasuda Auditorium and the General Library
Identified and recorded trace fossils and sedimentary structures present in the stones
Analyzed lithology from the Upper Cretaceous Futaba Group
A variety of trace fossils, including Thalassinoides, Ophiomorpha, and Scolicia, were identified
Physical sedimentary structures, such as parallel lamination and trough cross-lamination, were observed
Fossil findings indicate the geological history integrated into urban architecture

Implication

This report identifies trace fossils in building materials on a university campus, suggesting geological history in urban areas.

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Cite This Study

SEIKE et al. (2026) studied this question.

synapsesocial.com/papers/69ccb55116edfba7beb87596 https://doi.org/10.9795/bullgsj.77.1_21

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Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

1Classical and new bioerosion trace fossils in Cretaceous belemnite guards characterised via micro-CTOriginal Research · 2017 · 33 citations
2The Miocene serpentinite-derived clastic rocks in Soeushinai area in Horokanai Town, northern Hokkaido, JapanOriginal Research · 2026
3Rhizoliths and the Recognition of Plant and Microbial Trace FossilsOriginal Research · 2026
4Fossils from the Upper Musashino of Kazusa and ShimosaOriginal Research · 1922
5Palæozoic Plants from ChinaOriginal Research · 1908

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