Remingtonocetids were also found in shallow marine deposits, but they are obviously more aquatic than ambulocetids.
The upper Cretaceous sequence consists of shallow marine deposits that generally thicken northwards.
Most such shallow deposits were found early in the last century, Mr. Novikov said.
During the following year, large quantities of galena, or lead ore, were discovered around the settlement in shallow deposits.
The challenge for oil companies is that projects have grown in size and cost as the shallower deposits run out.
Soils for the most part form shallow, stony deposits over bedrock which is almost entirely igneous and largely basaltic.
The ores were being extracted at shallow deposits in the Andean foothills, whether by specialised workers or slaves/prisoners is unclear.
Arigna Coal Mine is famous for its very shallow deposits.
Decomposed granite accumulations are often shallow deposits within glacially scoured basins.
Perhaps, they say, a large number of shallower deposits may pose the greatest danger of a heart attack.