​Unique island with 400-million-yo sedimentary rocks in central Vietnam

Unique island with 400-million-yo sedimentary rocks in central Vietnam
Sedimentary rocks at the Ban Than Peak, one of the popular locations on Tam Hai Island off the central Vietnamese province of Quang Nam. Photo: Tuoi Tre

Visitors to a unique island in the central Vietnamese province of Quang Nam have the opportunity to witness a vast area of picturesque sedimentary rocks that are up to hundreds of millions of years old.

Tam Hai is an island off Nui Thanh District, Quang Nam Province, separated from the mainland by both the ocean and river.

Three sides of Tam Hai are surrounded by the Truong Giang (Truong River), while the other faces the sea.

Dark colored sedimentary rocks on Tam Hai.
Dark-colored sedimentary rocks on Tam Hai

Tourists are able to enjoy the untouched beauty of the sea and sand, palm trees, and especially the sedimentary rocks hundreds of millions of years old.

These unique rocks can be spotted at multiple locations across the island, namely Ban Than, Bai Nom, Bai Bac, Hon Dua, and Hon Mang.

A visitor poses for a photo alongside the unique rocks on the island.
A visitor poses for a photo alongside the unique rocks on the island.

Local authorities are carrying our necessary procedures so that the sedimentary rocks here can be recognized as a national geopark.

Recent examinations by scientists revealed that the areas have many features of a geological heritage site, including rocks, karst, the ancient environment, limestone strata, and tectonic structures among others.

Geologists believed that the sediments had first appeared about 400 million years ago during plate tectonics.

Sedimentary rocks along the beach
Sedimentary rocks along the beach

Located over 40 kilometers from Tam Ky City, Quang Nam Province, and about 100 kilometers from the central city of Da Nang, Tam Hai Island covers an area of 15 square kilometers.

Local residents earn their livings mainly from the sea and tourism. Visitors can reach the island only by ferry.

The sedimentary rocks are in different shapes and sizes.
The sedimentary rocks are in different shapes and sizes.
Sedimentary rocks along the beach
Sedimentary rocks along the beach
Honeycomb weathering can be noticed on a sedimentary rock on Tam Hai.
Honeycomb weathering can be noticed on a sedimentary rock on Tam Hai.
People fish near the rocks on Tam Hai Island.
People fish near the rocks on Tam Hai Island.
Local residents hunt for oysters at the Ban Than Peak.
Local residents hunt for oysters at the Ban Than Peak.
Local residents hunt for oysters at the Ban Than Peak.
Local residents hunt for oysters at the Ban Than Peak.
Local fishers and their catches following a journey at sea
Local fishers and their catches following a journey at sea

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