The era of metal in Dong Nai - Part II

​ 

   Iron Bridge only ( 10000'40 '' N - 107013'50 '' E ) is located on the coastal Basalt red mound springs to Doc , have absolute height of 100 meters , an area spread to thousands of m2 , Binh commune Loc Xuan Loc from about 10 km to the northwest , the Dong Nai Museum and Academy of Sciences - Social Ho Chi Minh City in late 1975 and discovered after much surveillance in collaboration with the Institute unearthed last 1976. This is a relic of the residence density stone tool manufacture dense . In keeping soil physical traces activities ( often referred to as archaeological cultural layer ) is only 0.75 cm thickness of 4 holes excavated with a total area of ​​320 m2 , archaeologists collected 788 specimens to improve total number of artifacts were collected on 840 units here include: four 294 ax - or hoe quadrilateral triangle , or investigating officers gripe with enough shoulder shape , perforated 76 , 4 and 50 knives knife harvesters , 60 key , 1 pestle grinding grain , millet 2 stone , 15 stone flaking , grinding table 269 , 5 piece round , 2 Department of quartz , 1 tectit . Raw materials for processing tools are mostly metamorphic schists and fine-grained rock horns , covered with weathered gray-green , yellowish or black . Iron Bridge made ​​of ceramic turntable or molded by hand , often decorated with the beating method - brush , roll or incised . Ceramic material common types of white , black , red, smooth or rough , identifiable piece of container types - food - such as cooking pots , your tummy and bottom round , bell mouth wide, 25-30 cm ; stand Grower bowl , 20 cm wide flared mouth ; pot or bowl -shaped tray with stand hold high office tubular .... Patterned ceramic only 16 % of the total collected 13,519 pieces .

    Overall, the collection of relics Iron Bridge brings full featured life Mountainous Agriculture and hunting in the jungle . Hundreds of stone tools shaped stable with sharp blade sharpening labor material is an important step installation personnel ancient people cut down trees to use - deforestation , farming tools crafted bamboo wood , the blades picked collection confirmation primitive method of harvesting agriculture cultivation using hoes - reaping knife fertile red soil hilly region of ancient Dong Nai . Farmers who reside here also are specialized artisans crafted stoneware and pottery . They have mastered the use of the most basic techniques of professional production tools - such as flaked stone jewelry , carved , chiseled , grinding , sawing , drilling and well versed in the secrets of ceramics from harvesting techniques - mixed land regime , shaped by the turntable , created by combing documents - dams , roll rope or incised pottery and burnt at high temperatures to create a harmonious product shape and balance . Besides manufacturing economy , the traces are considered key to the tower using bamboo wood used staff on crossbows also suggests that hunter- gatherers may be present in the economic exploitation of the region produce the hill Iron Bridge ancient rainforest .

    Same with Iron Bridge , located on Holy relics Stream 1 strip of land close to the left bank of river silt Baby , in 11 + 400 kilometers of open road from Hieu Liem ( Eternal ) to Ma Da , the union officials geological 20B detected late 1984, Dong Nai Museum staff , KCH Center and City university of synthesis . HCM survey and excavations started in 1985 with 3 holes ( 96 m2 ) at the top of the hill . In deep cultural layer from 0.5 to 1.4 m , were obtained up to 882 stone artifacts ( four 361 axes , 47 chisels , knives reap 65 type styles , 6 piece round , grinding table 409 ) and nearly 3000 pieces stripped . Ceramic materials and float 39 397 13 786 pieces of debris float along the cooking utensil commonly flared mouth , your hips round-bottomed pot type , with approximately 14 % have a pattern brush , strokes , print , incised and relief . This is a vestige of an ancient village residents with long -term nature of a handmade monument factory specialized manufacturing production tools - stone jewelry and pottery . The combination of stone working tools Spring Spirit with great features : diverse nature of this kind of stuff , especially hand tools chisels and knives reaper style , with large volumes of sketches rocks , grinding table , piece Duke demonstrates the presence a stone processing factory with even larger scale Iron Bridge . In addition, workers here also specializes in manufacturing ceramic float and are able to exchange the product for other areas , which scholars have considered relics - Spring Spirit workshop serves as a " factory tool " providing material production for Dong Nai ethnic communities at that time . Besides confirming the combination of more advanced and close to Iron Bridge Pottery Binh Da , Go Rock , The Van terms of imaging techniques with the aid of turntable and float or objects of art adorn ceramic rich , subtle , more complex ; rock assemblages Spring Spirit tells us that the similarity of image processing techniques and types of basic working tools with larger Iron Bridge remains any plant it in store the Dong Nai river system , which precisely thanks , Iron Bridge ( red soil hilly region Basalt ) and Suoi Linh ( alluvial lands along the river downstream Baby - Dong Nai ) is considered as 2 archeology monuments typical open stage cultural traditions - ice fabrication techniques - pottery in Dong Nai 2 periods bordering​