Jia-xian Sih-de Fossil Forest Reserve

Primary Object for Protection Codakia tigerina, crab, Jia-sian Pectinidae, Pleurotomariidae, and shark teeth fossil
Size of Area (ha) 11.232
Scope of Administration Compartment 4 of Ci-shan Working Circle for National Forest
Authority in-charge-of Pingtung Forest District Office, Forestry Bureau
History The nature reserve was established to preserve the forest in 1991 and Jia-sian Sih-de Fossil Forest Reserve has been established according to the official document No. 0951700407, issued by Forestry Bureau on April 10, 2006.


A dozen of years ago, millions of “Korean Lucinidaes” were sold in Jia-sian. This encouraged some enthusiasts to establish “Jia-sian Fossil Museum” because Jia-sian is one of the important regions having abundant sources of fossils across the island. There are five important shell fossils, inclusive of Atrina pectinata, flamboyant Pectinidae, Jia-sian Pectinidae, Korean Lucinidae, and Lucinoma annulatum. In order to protect those valuable species and place of origin, the area has been transformed in functions from the nature reserve founded in 1991 to the one having been setup by Taiwan Forestry Bureau in 1992 for preservation of fossils of many species in Sih-de, Jia-sian, aside from that national forest. Accordingly, Jia-sian Sih-de Fossil Forest Reserve was established according to the official document No. 0951700407, issued by Forestry Bureau on April 10, 2006.


The reserve, administered by Compartment 4 of Ci-shan Working Circle for National Forest under Pingtung Forest District Office, sits in the suburban Township of Jia-sian in Kaohsiung County. Plus, it is on the right side of Nan-zih River. The area of Jia-sian Sih-de Fossil Forest Reserve is 11.232 ha, between 20 and 350 meters above sea level.

An Introduction

Sih-de Fossil Valley shares majority of fossils all over Jia-sian. In the past, the place was known for its abundant resources of large fossils such as Jia-sian Pleurotomariidae, Tonnidae, Melongenidae, Acharax, Cucullaea, Atrina pectinata, flamboyant Pectinidae, Korean Lucinidae. Fossils in Jia-sian can be dated back to Miocene Period and belongs to Mt. Guang-dao sandstone layer and also a minority of Nan-jhuang Layer. It is the main composite of the mountains in the southwestern region. The sandstone in Guangdao Mountain has a harder composition than other types of stones in the area, enabling it to withstand weather erosion. This is the only reason why the major terrain in the region is the steeper hill. The sandstone layer, especially in the west of Nan-zih River, opened up five to six times due to a geological fault. This resulted in rows of mountain ridges. The higher part of the ridge has more Guangdao Mountain sandstone, which is younger than Nan-jhuang Layer in the side wings. The two layers belong to Ali Mountain in the category of a local topographic classification.

Biological Resources

The fossils dug out in Jia-sian can be divided into seven categories and 110 species. They are clams, scallops, scaphopoda, fish, coral, Acorn Bamacle, leaves, and hunting trails. Most of them are shell fossils like clams, and scallops. Flame corals, Acorn barnacles, leaves, and hunting trails that dug out in the region are as few as one or two pieces at most but they are still valuable.

Current Conservation Status

Human beings want to quest for tiny clues in rocks to explore the mystery of evolution of creatures in hope to find out where they are from. Persistent and endless exploration in rotation has been taking a large number of people’s energy and time. Besides being a topic of scientific research, rock fossils are also evidence of geological and historical research. They have much value in art and decorations. Therefore, after a heavy rain, people flock to this area to pick up fossils that have washed down by the rain. It is a pity that these fossils become personal possessions. The area has therefore been restricted and regular patrols have been set up. As a result, Forestry Bureau will collaborate with Jia-sian Township, by building a fossil museum, to provide local people an educational source on rock fossils. The area is actually ideal for an educational institution.

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Visit counts:3092 Last updated on:2017-08-01