flowstone

The researchers, including experts from Johannesburg and France, examined radioactive decay in rocks buried at the same time as the fossils, whereas earlier estimates were based on calcite flowstone deposits.

She also had flowstone and a rare kind of red obsidian, which originated outside of the UK.

This spring Reyes and others analyzed Canadian Arctic and sub-Arctic cave deposits, such as flowstones and stalagmites, and determined that Arctic permafrost soils thawed quite a bit during some ancient warm periods.

The walls of the cavern, wreathed in flowstone, glittered in brown and gray.

Some of these have bubbled together into flowstones, alluringly smooth formations that resemble miniaturized caramel mountain ranges.