Answer:
Due to erosion.
Explanation:
An unconformity refers to a type of geologic contact that occurs boundary between rocks. The main causes of Unconformities is erosion, wears away rocks and rock deposits never form. The most common cause of unconformity is erosion in which the younger rocks spread on older rocks with the passage of time. In Cardenas layer, erosion is also occurs that leads to unconformity in that region which leads to the formation of boundaries in the rocks.
The Andes have formed as a result of a subduction zone while the Himalayas have formed as a result of a convergent plate boundary.
Cambodia is located in the southern portion of the Indochina Peninsula.
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