The 2002 Biscuit Fire burned through more than 200,000 ha of mixed-conifer/evergreen hardwood forests in southwestern Oregon and northwestern California. The size of the fire and the diversity of conditions through which it burned provided an opportunity to analyze relationships between crown damage and vegetation type, recent fire history, geology, topography, and regional weather conditions o...

It typically occurs as an alteration product at the contact between felsic and mafic or ultramafic rocks such as pyroxenites and dunites. It also occurs in carbonatites and metamorphosed magenesium rich limestone. Associated mineral phases include: corundum, apatite, serpentine and talc. It occurs interlayered with chlorite, biotite and phlogopite.[2] Vermiculite Wikipedia, the free encyclopedi...

Ants are among the most ubiquitous and harmful invaders worldwide, but there are few regional studies of their relationships with habitat and native ant communities. New Caledonia has a unique and diverse ant fauna that is threatened by exotic ants, but broad-scale patterns of exotic and native ant community composition in relation to habitat remain poorly documented. We conducted a systematic ...

The petrological features of scoria samples and enclosed holocrystalline xenoliths from the last ~1000 years activity La Soufrière volcano St. Vincent (Lesser Antilles) are described in detail here. products investigated prehistoric eruptions (pre-1440, 1440, 1580 CE) relatively homogeneous basaltic andesites (with a paragenesis consisting plagioclase, clinopyroxene, orthopyroxene opaques) comm...

Cr-spinel [(Mg, Fe2+)(Cr, Al, Fe3+)2O4)] is a common mineral in the ultramafic core of Duke Island complex southeastern Alaska, US. grains with an unmixed texture have been observed dunite and wehrlite complex. Inhomogeneous ratio Cr/(Al + Cr Fe3+) <0.37 prominent dunite. The inhomogeneous consists two completely different compositions: Al-rich Cr-spinel, Fe3+-rich wide range content (from 1...

TheEmeishan large igneous province contains a diverse assemblage of igneous rocks includingmildly peralkaline granitic rocks ofA-type affinity. The granitic rocks from the Panzhihua, Baima andTaihe plutons are temporally, spatially and chemically associatedwith layeredmafic-ultramafic intrusions. Electronmicroprobe analyses of themajor and accessoryminerals along with major and trace element da...