Marine archaeologists using high-resolution sub-bottom profiling have discovered an extensive network of submerged storage pits in the Yellow River Delta. Dating back to approximately 2000 BCE, these pits were found to contain carbonized remains of foxtail millet, suggesting they were part of a sophisticated regional grain reserve system. The site is now three meters underwater due to shifting river courses and rising sea levels over the millennia.
This discovery provides critical data on the environmental history of early Chinese civilizations, revealing how Neolithic farmers managed agricultural surpluses in a highly volatile flood-prone landscape. The isotopic analysis of the millet suggests the crops were grown during a period of intense climatic cooling, forcing early societies to develop long-term storage solutions. Researchers believe this site represents one of the earliest examples of centralized food security infrastructure in East Asia.