Geographic coordinate:

Latitude: 12.260220 North

Longitude : 107.977720 East

Administrative location: Phu Son hamlet, Quang Phu ward, Krongno District, Daknong province.

Group of Nam Kar Volcanoes

On the terrain map, crater is quite circular. The dome of crater looks like an isosceles trapezoid from far distance, a sunken truncated cone-shape in closer look in the middle of bowled-shape, the ring fault raise higher. Standing in the summit, crater shaped middle sunken cone, the ring fault is oval-shaped: the long axis straight nearly the sub-latitude direction (3550). The outer flank of crater sloped 35 – 45 0 and the inner flank of crater sloped 45 – 600.

Nam Kar volcano erupted 5,3 – 0,78 Ma ago, in the sub second phase (Pliocene – Early Pleistocene) of third stages of Daknong Geopark historical geology.

Volcano shaped truncate cone or bowled-shape, middle sunken cone-shaped (due to volume skrinkage and gravity balance after eruption), ring fault rised higher, a characteristic type of central eruption, a case-study can be use in study, research about the principle of eruption at school and public educated.

The hierarchical structure of volcanic ash and coal interpose the layer of high viscosity and cracked block basaltic proved the various stages of eruption.

The Southeast edge of crater has an small steep side – probadly the sub-volcano (S2), contained stagnant lava, forced fold, consist of volcanic ash. This phenomenom show the stagnant magma when it reached the surface but it’s not enough energy for exploding to form a complete cone-shaped volcano or a sub-crater, it’s just a display as a small volcanic vent. Stage characteristic of this volcano has been reflexed.

The stagnant of clust’s chert lined the shingle, broken volcanic bomb and fored fold has proved the phenomenom of hot-tempered impact of volcanic product: when lava black exploded to the air, the outside of lava start to cooling down to create the chert layer, while lava is still hot inside and thermoplastic, the result of hot impact break the chert’s clust and  pliability.

Beside this volcano, basaltic mountainous belong to the high terrain of the Mount 52, it belongs to the lava flow of nearby volcano – probadly a result of crack eruption. The backside of this mountain is the basalt extraction factory which exploited to get construction materials. This basalt rock has grey black – black color, high viscosity and less buble, many aragonite holes to tell the characteristic of high volatility of lava.

The mount 52 volcano has a beautiful shape and the best fascinating volcano of Daknong Geopark, and one of the unique and beautiful mixed volcanoes in Central Highland.

The clusters weathering of basaltic contains nutritions to feed plants and high value industrial crops.

Group of Nam Kar Volcanoes

Cinder coned Nam Kar volcano

Geographic coordinates:

Latitude: North 120 15’ 48’’

Longitude : East 1070 58’ 38’’

From far distance, the dome of crater shaped pyramid, from above, it shaped truncated-bowl pyramid, the ring fault rise higher with oval-shaped, looks quite circular and a dozen diameters. The outside flank of crater sloped 45 – 700, the inside flank sloped 45 – 600 .

The eruption of  Phu Son volcano occurred around 5,3 – 1,8 Ma ago, in the sub-second phase (Pliocene – Pleistocene) and the third stage of Daknong Geoark historical geology.

The typical coned-shape and bowled-shape is the type of central vent eruption.

Mainly elements are volcanic ash chert with fored fold lava basalt, and volcanic bomb has proved the feature cinder cone of its, a typical case-study, unique and rare in Vietnam. These products of volcano is animated subject of study, an example for research and teaching about cindercone volcano, volcanic bomb and also the conceptual of cindercone formation in highschool and publish knowledge to community.

Cinder cone formed mainly by the phenomenom of gas-charged lava with the rich volatility lava, low viscosity, small volume. Lava is blowned up to the air with gas (volatile) of volcano and it breaks into small fragments, immediate cooling down to volcanic ash and bomb. The falling fragments in the crater usually forced fold because of hot-tempered due to the temperature of bottom products is still very high.

Tree mold has been found in the cinder cone volcano, their shape straight up or incline naturally in the crater has proved: before this eruption, there was a tropical forest with giant wood trees. When the lava with low viscosity and volatility containing sudden bowled-up with high pressure and falling down to create volcanic ash and volcanic bomb, spread a thick layer and buried trees of tropical forest. There were unburned trees felt down, and burn in the surface of ash, so that it remains their mold origin forming. The characteristic of tree mold fossil here is a scientific evident about the principle and creation environment of cinder cone volcanic.

This cinder cone has a beautiful shape and the best fascinating volcano of Daknong Geopark, and one of the unique and beautiful cinder cone  in Central Highland.

The clusters weathering of basaltic contains nutritions to feed plants and high value industrial crops.

Sub cindercone Nam Kar volcano

Administrative location: Phu Son hamlet, Quang Phu ward, Krongno District

This isn’t the characteristic of explosion volcano. The dome of crater simply is a small hill next to the main crater(M) without sunken-shaped in the summit. Steep-sloped is around 350-450 has been deformed by land clearance for farming.

Volcano size: the dimension of circular hill are 200m x 150m, around 20m – 30m height.

Nam Kar volcano actived approximately around 5,3 – 0,78 Ma, in the Sub-Second Phase (Pliocene – Early Pleistocene) of Third Stage of Daknong Geopark historical geology.

S2 – sub-volcano has cone-shaped without funned crater, its feature for sub-central vent volcanic due to the stagnant of lava and not enough energy for exploding. Lave escaped near the Earth’s surfure but it has been stucked, not enough energy for an explosion to create a complete funned-shape volcano, it’s just display as a small fissure vent. This’s the sign of divergence/stages of this volcano.

The stagnant of clust’s chert lined the shingle, broken volcanic bomb and fored fold has proved the phenomenom of hot-tempered impact of volcanic product: when lava black exploded to the air, the outside of lava start to cooling down to create the chert layer, while lava is still hot inside and thermoplastic, the result of hot impact break the chert’s clust and  pliability.

The existent of shingle, forced fold basalt block are the evident for the stagnant formation of Sub-Volcano S2.