Landslides occurred along the upper slope of the Cheonbul valley

Rockfall hazards in the Osaek valley

Outcrop feature in the Cheonbul valley

Bibong Eclogite Outcrop

Kwangcheon serpentinized ultramafic outcrop

Gunzihari Neoproterozoic granitoid outcrop

Hwajinpo Lake

Songjoho Lake

Ulsanbawi Rock - Cretaceous Sokcho granite

A cave pool inside Baegnyong Cave showing a newly forming passage in lower level from the main passage

Various speleothems within Baegnyong Cave such as stalactites, stalagmites, columns and flowstones

Sequence stratigraphic correlation of the Taebaek Group. After Kwon et al.(2006).

One of the oldest true skeletal reefs formed by stromatoporoids and bryozoans, Middle Ordovician Duwibong Formation along the Sorotgol section. From Oh et al. (2015; in preparation).

Early Ordovician carbonates of the Dumugol Formation exposed along the Seokgaejae section.

W skarn ore in the Myobong Slate of the Sangdong mine

Quartz porphyry (left) and garnet-rich skarn (right) in the Wondong Fe-Pb-Zn deposit

Sheath fold developed in the shear zone

Outcrop photograph showing Ky-St-Grt schists

Basaltic wall along the Hantan River

Cheolwon Lava Plateau and steptoes in DMZ (Cheolwon-gun)

Basalt ravine of Hantangang(river) and columnar joints (Cheolwon-gun)

Riverine wetland of Yangeuidae (Hwacheon-gun)

Dootayeon (plunge pool) (Yanggu-gun)

Haean basin (Yanggu-gun)

Yongneup (swamp) of Daeamsan (Mt.) (Inje-gun)

Block stream of Unbongsan (Mt.) (Goseong-gun)

Lagoon and tombolo (Goseong-gun)

Geologic map of the Jeongok area

Acheulean hand axes

Upper metapelite

Metaconglomerate

Metacalcareous rock

Lower metapelite

Volcaniclastic sedimentation of Gyeokpo Basin

The boundary between the Seokpo Tuff and the Gyeokpori Fm. in the Gyeokpo Basin

Uplifted basinfill (conglomerate) of the Jinan Basin

The Pes and manus of the pterosaur in the Early Cretaceous Jinju Formation (Hotandong tracksite)

Ignotornis gajinensis trackways and zig-zag shaped bill-marks in Early to Late Cretaceous Haman Formation (Gajin tracksite)

Deokmyeong-ri dinosaur tracksite of the Late Cretaceous Jindong Formation

Gohyeon-ri dinosaur tracksite of the Late Cretaceous Jindong Formation

The Geoje Galgot-ri tracksite of the Late Cretaceous Seongpori Formation

Yeosu Nangdo-ri Dinosaur Tracksite

Dinosaur tracks at the Late Cretaceous Nangdo-ri tracksite

Late Cretaceous Hwasun Dinosaur tracksite

Theropod trackways at the Hwasun Dinosaur tracksite

Dinosaur egg at the Boseong Bibong-ri Fossil site

Location maps of coastal terraces in the southeastern part of Korean Peninsula: TS4-1 and TS4-2 (Heunghae, Pohang City), TS8 (Yangnam, Gyeongju City)

Left (TS4-1): Eupcheon Coastal Terrace, 2nd Tr(L), is composed of pebble beach gravel toward Nasan Elementary School.
Right (TS4-2): Eupcheon Coastal Terrace, 2nd Tr(L), is composed of pebble to cobble beach gravel towards the direction of the beach.

OSL chronology of Coastal Terraces in the north of Pohang: The 2nd coastal terrace as high as 34m (2nd Tr (H)) were formed during the high stand of sea level in the Last Interglacial (MIS 5e), while the 2nd coastal terrace as low as 10-12m (2nd Tr (L)) were formed during the high stand of sea level in the Last Interglacial (MIS 5a).

Ornithopod trackway on the Late Cretaceous lacustrine mudflat deposits at Deokmyeongri, Goseong

Dinpsaur Museum at Deokmyeongri Dinosaur tracksite, Goseong

Coastal outcrop of the Late Cretaceous volcaniclastic deposits at Taejongdae, Busan National Geopark

Panorama view of the Late Cretaceous fluvial deposits along the Songdo coast, Busan National Geopark

(a, b) Regional geological map around the study area. (c) Distribution of Quaternary fault sites in the southeastern part of the Korean peninsula. The youngest OSL or C14 ages of the sediments displaced by the faults at each site (marked with numbers within white boxes) are presented in black boxes. (from Lee et al., 2015).

Above: Outcrop photo of the Suryum fault. Numbers in white quadrangles indicate units from 1 to 8. Red lines represent the major fault (F1) and two subsidiary faults (F2 and F3). White open circles are sample sites for OSL age dating, and solid white circle is for 14C date. Black asterisk is for OSL ages reported by Jeong et al. (2007). Blue rectangle indicates close-up photograph for Units 1, 2 and 3 in the vicinity of the reverse fault line F1. (from Choi et al., 2009)

A conceptual model of the Korea EGS pilot project, and site image.

Fan-shaped columnar joint of the Early Miocene basalt

A NNE-striking fault of the Miocene Ocheon Fault System showing a fault damage zone

Dusong Peninsula geosite: syn-depositional normal faults

Songdo Peninsula geosite: Lower-Dadaepo Formation

Seaside walkway along Dodong Coast showing both external and internal outcrops of lava and ignimbrite layers.

Outer rim of the Ulleung Island caldera and the Albong

Dongdo of Dok Island

A lava raft observed in the Manjang Cave showing the repeated lava flows during the volcanic eruption

A tube-in-tube structure in the Manjang Cave indicating more than two separated lava flows