• Journal of the Korean earth science society
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• v.23 no.7
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• pp.543-551
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• 2002

The purpose of this study is to investigate the types of middle school students’ responses to dinosaur extinction inconsistent with the students’ previous conceptions. The types of texts about ‘the cause of dinosaur extinction’ were developed; one that was based on students’ previous ideas, while the other was based on conflicting materials. The students’ responses to the conflict materials were classified into six types: rejection, reinterpretation, uncertainty, belief decrease, partial theory change, and conceptual change. These results show that the use of conflict materials does not always promote conceptual change. Therefore, teachers will be able to help students change their conceptions in science classrooms by understanding students’ various responses to conflict materials and designing instructional strategy concretely.

• Economic and Environmental Geology
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• v.54 no.3
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• pp.311-330
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• 2021

The Sinseongri site contains at least eleven theropod trackways, three sauropod trackways, and one or more ornithopod walkways of dinosaur footprints. The host rock at the site is primarily siltstone and mudstone, but thermal alterations have metamorphosed it into hornfels. Except for micro cracks and exfoliations, joint systems in various directions appeared on the surface of the fossils site and showed a low share of all damage factors. The host rocks in the fossils site demonstrated relatively high physical properties as a result of ultrasonic velocity and were classified as stable. More than half of the fossils required reinforcement to control the progression of cracks if the type of conservation treatment was subdivided according to the damage type of dinosaur footprint fossils. The white paint used to visualize the footprints seems to deteriorate, allowing rock debris to spill out and causing damage to the fossil site, and alternative visualization schemes should be considered.

• Journal of the Korean earth science society
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• v.33 no.4
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• pp.329-336
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• 2012

In September 2009, a perfectly preserved fossil of a dinosaur egg nest was discovered in the Cretaceous formations of the Aphaedo area in Shinan, Jeollanam-do, South Korea. In order to estimate the age of dinosaur eggshells and the depositional age of the Cretaceous sediments in Aphaedo area, a whole-rock K-Ar dating was carried out on volcanic pebbles showing a sedimentary structure contemporaneous with the Aphaedo strata, acidic tuffs overlaying the strata conformably, and acidic dike rocks intrude to both of them. Volcanic rocks observed in the strata are 3-20 cm in diameter as pebbles found in lenticular conglomerate and pebble bearing mudstone strata. K-Ar whole-rock dating was performed on six different volcanic pebbles which show a sedimentary structure contemporaneous with the dinosaur egg nest contained in the strata, and all samples show Late Cretaceous ages: Cenomanian ($97.6{\pm}1.9$Ma), Coniacian ($87.6{\pm}1.7$ Ma), Santonian ($84.5{\pm}1.7$Ma) or Campanian ($82.5{\pm}1.6$, $77.3{\pm}1.5$, $75.7{\pm}1.5$ Ma). The K-Ar whole-rock age of acidic tuffs overlaying the Cretaceous formation conformably was estimated to be Campanian ($79.2{\pm}1.6$ or $77.3{\pm}1.5$Ma), when the dating was carried out under the same conditions. The acidic dike intruding both Cretaceous formation and acidic tuff showed a K-Ar whole-rock age of $70.9{\pm}1.4$Ma (Campanian). Therefore, the depositional age of the Cretaceous formation in the Aphaedo area and the time when dinosaurs lived in the study area are considered to be 77-83 Ma. Such results indicate that the ages of dinosaur eggshells from Aphaedo area can be correlated with the ages of the Seonso Formation (81Ma) with dinosaur egg nest fossils and the Uhangri Formation (79-81Ma) with dinosaur, pterosaur and web-footed bird tracks.

• Korean Journal of Heritage: History & Science
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• v.47 no.2
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• pp.46-67
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• 2014

The Dinosaur track-bearing deposits recently found at Bangudae Petroglyph site in Ulju (National Treasure No. 285) have been studied in the aspects of sedimentology, paleoenvironments, and significance in natural history. The dinosaur tracks occur in the Daegu Formation (late Early Cretaceous), and over 80 footprints including 43 ornithopod footprints, 36 sauropod footprints, and 2 theropod footprints are preserved in this tracksite. The track-bearing deposits consist of irregularly interlaminated siltstone and mudstone, calcareous sandy to silty mudstone, thin-bedded tuffaceous sandstone, planar- to cross-laminated sandstone, and thin- to medium-bedded graded sandstone, and they are interpreted to be sheetflood deposits on an alluvial plain. Diverse types of ripples and mudcracks, rainprints, and invertebrate trace fossils are observed in these deposits, and the crest-lines of wave ripples do not show preferred orientation. Dinosaur footprints occur as true prints, underprints, overtracks, and casts on the bedding surfaces, and the orientation of trackways are scattered. It is interpreted that paleoclimatic condition of the track-bearing deposits were semiarid with alternation of wetting and drying periods, and that dinosaurs frequented small and shallow ponds during wetting periods and recorded their tracks on an alluvial plain. The frequent occurrence of dinosaur tracks in study area indicates that the Cretaceous deposits around Daegokcheon Stream are very useful sedimentological and paleontological records to understand the paleoecology and paleoenvironments during the dinosaur age in Korean Peninsula. Consequently the dinosaur track-bearing deposits around Daegokcheon Stream should be further studied in sedimentary geology and paleontology in order to enhance cultural heritage value of the Petroglyphs of Bangudae Terrace as the World Heritage.

• Journal of The Korean Association For Science Education
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• v.24 no.5
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• pp.959-976
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• 2004

The purpose of this study was to investigate high school students' ideas related with dinosaur extinction, to classify students' responses types with alternative hypotheses of inconsistent with their ideas, and then to examine their cognitive conflict levels and the degree of ideas change. To investigate students' ideas, we analyzed responses 98 eleventh graders of a high school in Anyang area. The results of this study were as follows: First, most of the students responded a large scale asteroid impact with the cause of dinosaur extinction, and rest of them responded changed Earth's climate accompanying tectonic activity, extreme volcanic activity, shortage of food, disease(virus) and decrease of their habitat. Also, they thought that dinosaur was exterminated not by just one reason but by several complex reasons. Second, the students' responses of alternative hypotheses were classified into six types: rejection, reinterpretation, uncertainty, belief decrease, partial theory change, and theory change. Third, except rejection and reinterpretation types, other four types were arousing of cognitive conflict and the percentage of the students who felt cognitive conflict was 62.3% and that of the students who took the theory change was just 6.1 %.

• Journal of Environmental Science International
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• v.12 no.9
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• pp.905-910
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• 2003

The valuable fossils are distributed in Korean peninsula. In consequence of the development of inland, many road constructions and other public works have been carried out. As a matter of course, lots of paleontological materials in Kyongsang basin were destroyed. Fortunately, one of them was rescued and restored in a suitable place by authors. A fine 4×5 m sandstone slab having about 40 dinosaur tracks was brought from Sangchon-ri, Jinju city, and restored at Danghangpo, Goseong County, Gyeongsangnam-do Province. This fossil bearing slab suggests dinosaurs' ecology and paleo-environment during the early Cretaceous Period of Kyongsang basin.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.679-680
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• 2013

• 한국석유지질학회:학술대회논문집
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• autumn
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• pp.77-77
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• 2000

• Journal of the Korean earth science society
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• v.33 no.7
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• pp.618-626
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• 2012

The Cretaceous fossil sites of Seoyuri in Hwasun was designated as the Korean Natural Monument No. 487 in November 2007. It provides important resources for paleoenvironmental studies, including theropod trackways, plant fossils, mudcracks, ripple marks, and horizontal bedding. The Cretaceous sedimentary strata contain a wide variety of volcanic pebbles, 5-40 cm in diameter in the lower portion and are overlain by the Late Cretaceous Hwasun andesite. Whole rock absolute K-Ar age determinations were performed on six volcanic pebbles from the Cretaceous sedimentary strata and on two samples from the overlaying Hwasun andesite. These ages indicate that the rocks belong to the period between the Turonian of the late Cretaceous (91-70 Ma) and the Pliocene age of the early Cenozoic ($63.4{\pm}1.2$ and $62.1{\pm}1.2$ Ma). Thus, the K-Ar ages indicate that the maximum geological age of the dinosaur track-bearing sedimentary deposits is about ca. 70 Ma. Therefore, it suggests that the age is comparable to the formation ages of the dinosaur footprints-bearing deposits in Sado area of Yeosu (71-66Ma).

• Journal of the HCI Society of Korea
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• v.8 no.1
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• pp.19-28
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• 2013

As yet the use of 3D scanning technology has been limited to documentation, preservation and monitoring in cultural and natural heritage domain. Appropriate visualization of precise geometric information in scan data can support scientific interpretation of the domain experts. We studied the rendering techniques which visualize the required features from scanned models, and proposed a 3D scan data visualization pipeline, rendering methods, and a classification scheme. As a case study, we analyzed the traditional method in the study of dinosaur tracks and performed the visualization of 3D scanned models. A user test based on the result confirmed an effectiveness of the proposed method. This research showed a practical method in which 3D scanned models can be used to effective interpretation of heritage.