This petroglyphs are carved on the flat surface of a huge rock (9.5m wide and 2.7m high), at an angle of 20 degrees to vertical, beside the river. It is 5Km away from Bankudae Petroglyphs to the north upper stream, in the canyon, but the area of upper stream from here is an agricultural land as a basin. It is called 'chonzonri Kaksok', 'kaksok' means an engraved or carved stone in korean, which is located in chonzonri, Ulsan, near Kyongju, Korea.

There are also so many dinosaur footprints on the rock ground across the river, in front of this rock. "On an outcrop of about 1,750 square meters to the east of the stream that flows into the Sayon Dam are over 200 footprints including those of 10 sauropods such as Ultrasaurus, a large herbivorous dinosaur, 10 Goseongosaurus, belong to the ornithopod Iguanodon, a medium size herbivore, and a footprints of a carnivorous Megalosaurus. The footprints are not in parallel to each other, indicating the dinosaurs were not progressing in a specific direction but were peacefully rambling over the area. The area containing the footprints is medium gray mudstone hornfels of non-red beds in the upper part of the Sayonri Formation of the Hayang Group of the Kyongsang Supergroup. " (1)

This rock was first discovered by 'Moon MyongDae' while investigating Buddhist remains around Bankudae in December 1970. There are complex rock carvings; geometrical figures, engraved shapes of animals, finally scratched old chinese characters in the lower part. (The intellectuals in korean peninsula used to write chinese over a thousand years, korean characters created by king Sezhong of Chosun Period in A.D. 1443) In there the name of sexagenary cycle year was found, so characters were probably engraved before A.D. 525. The contents and figures of cavalcade are thought to show the events of 'Hwarang' that was chivalry in the Shilla period, and geometrical images are thought to be carved maybe in the Neolithic Age or the Bronze Age. (2) This rock is now being protected as a national treasure No. 147.

Many scholars have been studied in petroglyphs on this rock after discovered. But there are still some of problems ; Although concentric circles have found in the petroglyphs of the other area, strangely no more found the figures of diamonds in the south of korean peninsula (Sadly we can not know perfectly what, which is going on in North Korea), except for the patterns of diamonds of earthen vessels had made in Neolithic Age. Another close resemblance of geometric figures can be found in the kerbstones petroglyphs of Newgrange, Knowth and Loughcrew Cairn in Ireland, and also ones which made by the american Indians in USA. (Photos taken in 1988, Apr 1997, written in Apr 1997)

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(1)quote from Information board
(2)Hwang SuYong, Moon MyongDae, 'Bankudae', Dongkuk Univ., 1984. (p152)