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the claim

Fossils occur mostly in sedimentary rocks.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
8 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that fossils occur mostly in sedimentary rocks?

Yes. A reference guide states fossils are not found in igneous or metamorphic rocks and that sedimentary rocks are where to look, which directly supports the claim. Several other sources describe fossils preserved in sedimentary rocks at particular formations and localities, consistent with but narrower than the general claim.

Verdict: SUPPORTED · 8 sources for, 0 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 8
Fossil Collecting/Finding Fossils
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Fossil Collecting/Finding Fossils. (n.d.). en.wikibooks.org. https://en.wikibooks.org/wiki/Fossil_Collecting/Finding_Fossils

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More for · 7
Sedimentary Geology
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Technology, M. I. o. & Southard, J. (n.d.). Sedimentary Geology. ocw.mit.edu. https://ocw.mit.edu/courses/12-110-sedimentary-geology-spring-2007/

Photographic data from specimens of Ediacaran fossils and sedimentary rocks from Brazil
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Photographic data from specimens of Ediacaran fossils and sedimentary rocks from Brazil. (n.d.). data.europa.eu. https://data.europa.eu/data/datasets/photographic-data-from-specimens-of-ediacaran-fossils-and-sedimentary-rocks-from-brazil

Replication in Plastic of Three-Dimensional Fossils Preserved in Indurated Clastic Sedimentary Rocks
1984
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Zapasnik, H. T. & Johnston, P. A. (1984). Replication in Plastic of Three-Dimensional Fossils Preserved in Indurated Clastic Sedimentary Rocks. doi.org. https://doi.org/10.1126/science.224.4656.1425

Stratigraphy and geochronology of the late Miocene Adu-Asa Formation at Gona, Ethiopia
2008
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L., K. L., Jay, Q., & C., M. W. (2008). Stratigraphy and geochronology of the late Miocene Adu-Asa Formation at Gona, Ethiopia. authors.library.caltech.edu. https://doi.org/10.1130/2008.2446(02)

岐阜県舟伏山石灰岩中のP 2 O 5 およびMgOの成分分布と地質について
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岐阜県舟伏山石灰岩中のP 2 O 5 およびMgOの成分分布と地質について. (n.d.). cir.nii.ac.jp. https://doi.org/10.11451/mukimate1953.1969.4

Integrated chronostratigraphy of Proterozoic-Cambrian boundary beds in the western Anabar region, northern Siberia
1996
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J., K. A., H., K. A., & A., S. M. (1996). Integrated chronostratigraphy of Proterozoic-Cambrian boundary beds in the western Anabar region, northern Siberia. authors.library.caltech.edu. https://authors.library.caltech.edu/records/33wqq-rbm63

Hominins on Sulawesi during the Early Pleistocene.
2025
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Hakim, B., Wibowo, U. P., Bergh, G. D. v. d., Yurnaldi, D., Joannes-Boyau, R., Duli, A., Suryatman, Sardi, R., Nurani, I. A., Puspaningrum, M. R., Mahmud, I., Haris, A., Anshari, K. A., Saiful, A. M., Bungaran, P. A., Adhityatama, S., Muhammad, P. H., Akib, A., Somba, N., & Fakhri (2025). Hominins on Sulawesi during the Early Pleistocene.. doi.org. https://doi.org/10.1038/s41586-025-09348-6

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