Qualla: Guogang Shell Fossils

Guogang Shell Fossils: Introduction

Sat, 13 Jun 2026 00:00:00 GMT

Photo credit Outlookxp, CC BY-SA 4.0. Railway workers found the sea inside the cliff. In 1921, construction crews building Taiwan's Coastal railway line cut through the hillside near Houlong and exposed a wall of stone packed with shells — scallops, cockles, murex, turritella — layer after layer of them, pressed into gray shale like a pantry left by a vanished ocean. The shells were not scattered. They were dense, almost violent in their concentration, suggesting repeated storms over millennia that swept the seafloor creatures into this hollow and buried them under silt before they could scatter. What the workers uncovered was a record of the Pleistocene, frozen in stone on a hillside in Miaoli County.

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Image: Outlookxp | CC BY-SA 4.0

Guogang Shell Fossils: Half a Million Years Compressed into Shale

Sat, 13 Jun 2026 00:00:00 GMT

Photo credit Taiwankengo, CC BY-SA 4.0. The Guogang Shell Fossils belong to the Toukeshan Formation, a widespread Pleistocene geological layer that underlies much of western Taiwan. The fossils embedded here date from between approximately 1,030,000 and 460,000 years ago — a span of more than half a million years durin...

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Image: Taiwankengo | CC BY-SA 4.0

Guogang Shell Fossils: A Census of the Pleistocene Sea

Sat, 13 Jun 2026 00:00:00 GMT

Photo credit Taiwankengo, CC BY-SA 4.0. Running your eye across the exposed face of the fossil bed is something like reading a catalog of an ancient reef. The most numerous shells belong to the Pecten genus — fan-shaped scallops whose ribbed surfaces are recognizable even in stone. Alongside them: Chlamys, a close scal...

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Image: Taiwankengo | CC BY-SA 4.0

Guogang Shell Fossils: Protected, Then Threatened, Then Protected Again

Sat, 13 Jun 2026 00:00:00 GMT

Photo credit Taiwankengo, CC BY-SA 4.0. The Japanese colonial government recognized the site's significance quickly. In 1935, just fourteen years after the railway workers' discovery, the Government-General of Taiwan designated the fossil bed as a natural monument — one of the few geological sites to receive that statu...

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Image: Taiwankengo | CC BY-SA 4.0

Guogang Shell Fossils: The Living Cliffs of Houlong

Sat, 13 Jun 2026 00:00:00 GMT

Photo credit Taiwankengo, CC BY-SA 4.0. The Guogang fossil site sits along the coast near Houlong in northern Miaoli County, where the hills come close to the Taiwan Strait before the land flattens into agricultural lowlands. The setting is unexpectedly dramatic for a spot that rarely appears on international tourist i...

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Image: Taiwankengo | CC BY-SA 4.0