Chinanews.com, Harbin, December 18 (Reporter Wang Nina) On December 18, the Cretaceous Heilongjiang Hailun Biota Fossil Research Survey Results Conference was held in Harbin, which was repeatedly inspected by well-known experts and scholars in the field of geological research and paleontological fossils by national authorities Demonstration, a rare Cretaceous biota found in the Helen Grand Canyon.
The conference site.
Photo by Li Jiangming
The Paleontological Remains of the Hailun Grand Canyon are located in the Hailun National Forest Park in Heilongjiang, with a valley length of more than 10 kilometers.
Since 2018, Hailun City has invited paleontologists from national authoritative institutions such as China Geological Museum, Beijing Natural History Museum, and Shenyang Geological Survey Center of China Geological Survey to visit Hailun three times and discovered rare Cretaceous biota fossils.
Forward the research findings.
Photo by Li Jiangming
After repeated investigations and demonstrations by well-known experts and scholars in the field of geological research and paleontological fossils by the national authority, the rare Cretaceous biota found in the Hailun Grand Canyon includes fern stem fossils, gymnosperm wood fossils, dinosaur fossils and turtle fossils, etc. Great historical and scientific research value.
At the meeting, researcher Zhang Lidong, deputy chief engineer of the Shenyang Geological Survey Center of China Geological Survey, released the results of the paleontological survey of the Grand Canyon in Hailun.
Through investigation, it is found that the paleontological remains of the Hailun Grand Canyon mainly consist of 3 major types of plant fossils, 5 families and 8 genera, including Cretaceous tree ferns, Dempsky Pteridophytes, Dempsky Pteridophytes, Cylinaceae Heilongjiang genus, and Alsophila. Stem, Osmunda, Osmunda, Cycads, Conifers, Taxodium, Primitive Taxodium, Sequoia-type Wood; Animal fossils can be divided into 4 major categories, namely Paleozoic protozoa Like fossils, invertebrate gastropods, reptiles, turtles and dinosaur bones, Quaternary mammals, mammoths and bisons.
Through comprehensive indoor sorting and regional stratigraphic correlation, it is preliminarily believed that the stratum of the Hailun Grand Canyon should belong to the Late Cretaceous-Neogene.
What needs special explanation is that in view of the fact that the paleontological fossils in the upper gravel layer are multi-category, multi-aged, and are well rounded and redeposited, it is speculated that the upper paleontological fossils should come from the surrounding Paleozoic to Mesozoic geological bodies and should be deposited slightly earlier than the gravel layer. era.
Cheng Yeming, a researcher at the China Geological Museum, released the research results of the Cretaceous Heilongjiang Hailun Biota: After investigation and investigation, Heilongjiang was found to be the only area in China that produced Dempsky Ferns, and Helen produced a large number of Dempsky Ferns and large individuals.
The discovery of a large number of Dempsky fern stems indicated that the tree fern in the northern Songliao Basin plant community may be a dominant group in some areas.
At the same time, the discovery of this fossil also provides evidence for the comparison of the Cretaceous strata in China with the contemporaneous strata in other parts of the world.
Based on this, in the Late Cretaceous, the Hailun area was a soothing coastal and shallow lake environment, with rivers vertical and horizontal, and the Hailun Grand Canyon was at the intersection of rivers and lakes, belonging to a lake-alluvial fan delta environment.
At that time, the climate should be warm and humid, with lush vegetation, ferns and coniferous gymnosperms, and turtles, dinosaurs and other vertebrates living and multiplying on the lakeshore, forming a good terrestrial ecosystem.
After a large number of animals and plants died normally or abnormally, they were quickly buried by volcanic ash or sand to form fossils.
The Paleontological Remains of the Hailun Grand Canyon are an excellent popular science place to showcase the geological historical changes, fossil burial and excavation.
Paleontological fossils have a high degree of silicification, their structure and structure are intact, and they have typical environmental indicators. Therefore, the paleontological fossils of the Hailun Grand Canyon have scientific research value for further in-depth research, and then discuss the paleogeography, paleoenvironment and paleoclimate of the Hailun area at that time.
Experts released the results of the investigation at the meeting.
Photo by Li Jiangming
At the press conference, the Shenyang Geological Survey Center of China Geological Survey handed over the research results of the fossil research of the Hailun Biota in Heilongjiang to Hailun City.
The remains of the Paleobiota of the Hailun Grand Canyon are an important basis for studying the vegetation, palaeoenvironment and palaeoclimate of the dinosaur era in Northeast China, and for discussing the relationship between the Cretaceous flora in East Asia, Western Europe and North America.
Hailun Municipal Party Committee Secretary Wang Xuebin said that in order to protect and make good use of the Paleontological Remains of the Hailun Grand Canyon, this non-renewable treasure house of resources, Hailun City will rely on Hailun National Forest Park’s unique endowment of paleontological fossil resources to implement protective development and utilization, and make every effort to build Featured geological cultural tourism industry brand.
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