Halloysite clay minerals are ubiquitous in soils and weathered rocks where they occur in a
variety of particle shapes and hydration states. Diversity also characterizes their chemical …

Soils formed in volcanic ejecta have many distinctive physical, chemical, and mineralogical
properties that are rarely found in soils derived from other parent materials. These distinctive …

Chemical weathering indices are commonly used for characterizing weathering profiles by
incorporating bulk major element oxide chemistry into a single metric for each sample …

The tropical forests of the Amazon Basin occur on a wide variety of different soil types
reflecting a rich diversity of geologic origins and geomorphic processes. We here review the …

Soil samples were collected in six South American countries in a total of 71 different 1 ha
forest plots across the Amazon Basin as part of the RAINFOR project. They were analysed …

Publisher Summary Volcanic ash soils display a wide range of chemical characteristics that
strongly reflect the influence of the parent material and degree of weathering. Of these …

The parent materials of all Icelandic soils are volcanic in origin, and most of the soils are
classified as Andosols. Iceland has the largest area of Andosols in Europe, and may have> …

MINERALOGY, CHEMISTRY AND Page 174 VARIABLE CHARGE SOILS: THEIR
MINERALOGY, CHEMISTRY AND MANAGEMENT Nikolla P. Qafoku, 1 Eric Van Ranst, ² Andrew …

Silicates constitute more than 90% of the rocks exposed in the Earth's land masses (Garrels
and Mackenzie, 1971). Most primary minerals comprising these rocks are …

Volcanoes are revered and feared for their awesome and devastating eruptions that often
obliterate terrestrial ecosystems and bury landscapes with volcanic ash. Yet from these …