A granodiorite stock intrudes complexly folded and thrust-faulted Paleozoic sedimentary rocks in the Osgood Mountains of eastern Humboldt County, Nevada. Within the metamorphic aureole surrounding the pluton, the sedimentary rocks are converted to cordierite hornfels and marble; tungsten-bearing tactites developed along the contacts of the granodiorite. Cutting the granodiorite and sedimentary rocks is the Getchell fault, along which the disseminated gold ore bodies of the Getchell mine are localized. K-Ar ages of the granodiorite, andesite porphyry, tungsten-bearing tactites, and altered granodiorite from the Getchell mine indicate that emplacement, alteration, and mineralization are all part of a magmatic-thermal episode which took place approximately 90 m.y. ago.

Key Concepts in Geomorphology is a book about our planet’s dynamic surface, a place where Earth and atmosphere meet and life thrives. By its very nature, geomorphology, the study of Earth surface processes and history, is an integrative discipline. As geomorphologists, we strive to make sense of the complicated web of interactions shaping mountains and valleys, moving sediment and water downslope, and changing the shape of continents and ocean basins over millennia. A deep understanding of geomorphology requires not only expertise in solid-Earth geology but also the ability to use principles of physics, chemistry, biology, and mathematics to understand Earth surface processes and the evolution of topography over short and long timescales. <...>

This special issue of the Mineralogical Almanac is devoted to the Kola Peninsula. The main article by I.V. Pekov and A.P. Nikolaev is on the mineralogy of peralkaline pegmatites and hydrothermal bodies of the Koashva apatite deposit in Khibiny. The history of its exploration and geology are outlined, the pegmatite-hydrothermal complex is characterized and 127 minerals are described.

An article by A.V. Voloshin is focused on the history of mineralogical studies of the rare-element granite pegmatites of Kolmozero and Voron'i Tundras and the amazonite pegmatites of West Keivy. The paper by Yu.L Voitekhovsky is devoted to almandine and its deposits in West Keivy. A.V. Voloshin, I.V. Pekov and V.V. Borisova give a historical review with statistical data on 264 new minerals first discovered in the Kola region. A special article is devoted to the collection by V.G. Grishin, one of the most interesting modern collections of the Kola minerals.

La Candelaria is the largest of the iron oxide Cu-Au(-Zn-Ag) deposits in the Punta del Cobre belt, which also hosts the Punta del Cobre district, sensu strictu. The Punta del Cobre belt lies within an Early Cretaceous continental volcanic arc/marine back-arc basin terrane. The volcanic arc and marine carbonate back-arc sequences are intruded by Early Cretaceous granitoid plutons that form part of the Chilean Coastal Batholith. The deposits of the Punta del Cobre belt occur along the eastern margin of the batholith within (e.g., La Candelaria) or just outside the contact metamorphic aureole (e.g., the Punta del Cobre district). Andesitic volcanic and volcaniclastic host rocks are intensely altered by biotite-quartz-magnetite. This style of alteration extends much further to the east of the intrusive contact than the metamorphic mineral associations in the overlying rocks that are clearly zoned outboard. Local areas of intense calcic amphibole veining that overprints all rock types occur within the contact metamorphic aureole.