A forgotten boulder, recently re-examined, is providing new insights into the origins of Stonehenge's bluestones. Analysis of the Newall boulder reveals its mineral composition matches stones from a ...

A forgotten stone from a 1924 dig is now steering a long running Stonehenge debate in a clear direction. New analyses of the hand sized Newall boulder point to people, not ice, as the movers of the ...

THE occurrence of stilpnomelane in Great Britain was first recorded by Hallimond 1. He described the mineral from the Pen-y-rallt mine in Merionethshire, where it occurs in a pisolitic ironstone bed ...

See more palygorskite on my andradite garnets page. See also ajoite on my copper minerals page. Wickenburgite is on my lead minerals page.

Five serpentinite mud volcanoes were sampled during three scientific ocean drilling campaigns: Yinazao (55 km distance to the Mariana Trench, ∼13 km depth to the slab, ∼80°C at the slab–mantle wedge ...

High-pressure (HP) rocks exhumed from subduction zones usually record much warmer geotherms than numerical modelling results, as their peak mineral assemblages are always modified during the ...

Where did the Stonehenge bluestones come from? Scientific advances are allowing us to pinpoint the outcrops that they were quarried from with ever-greater accuracy. Rob Ixer, Richard Bevins, and ...

ALGER — It didn’t look like much, just a typical rock face in the Chuckanut Mountains. But this rock face, located beside a road cut on Blanchard Mountain, was far from typical. Within its strata and ...

Figure 1. A zun (Chinese ritual wine vessel) ornately carved from Guangxi black nephrite in the form of a tiger squatting on all fours with a bird on its back. Photo courtesy of Hongwei Ma. In 2011, a ...

Ring-in-ring structures in Australian Early Precambrian banded iron formation (BIF) were identified as bubbling mud wavelets, which lithified during temporary exposure, contradicting the alleged BIF ...