Twinning in “anorthoclase” megacrysts from phonolitic eruptions, Erebus volcano, Antarctica

Timing of intense magmatic episodes in the northern and central Sierra Madre Occidental, western Mexico

Process of granophyre crystallization in the Long Mountain Granite, southern Oklahoma

New single crystal 40 Ar/ 39 Ar ages improve time scale for deposition of the Omo Group, Omo–Turkana Basin, East Africa

Megacrysts and salic xenoliths in Scottish alkali basalts: derivatives of deep crustal intrusions and small-melt fractions from the upper mantle

THE COMPOSITION OF ANORTHOCLASE AND NEPHELINE IN MOUNT KENYA PHONOLITE AND KILIMANJARO TRACHYTE, AND CRYSTAL–GLASS PARTITIONING OF ELEMENTS

Magmatic processes associated with caldera collapse at Ossipee ring dyke, New Hampshire

Precise 40 Ar/ 39 Ar geochronology for the upper Koobi Fora Formation, Turkana Basin, northern Kenya

An FTIR study of hydrogen in anorthoclase and associated melt inclusions

Cordierite-anorthoclase hornfels xenoliths in Stromboli lavas (Aeolian Islands, Sicily) : an example of a fast cooled contact aureole

Integrated chronostratigraphic calibration of the Oligocene-Miocene boundary at 24.0 ± 0.1 Ma from the CRP-2A drill core, Ross Sea, Antarctica

Anorthoclase, sanidine and associated megacrysts in Scottish alkali basalts; high-pressure syenitic debris from upper mantle sources?

Volcanic chronology of the Men–Kilimanjaro region, Northern Tanzania

K-Ar and 40 Ar/ 39 Ar dating of the hominid-bearing Pliocene-Pleistocene sequence at Koobi Fora, Lake Turkana, northern Kenya

Anorthoclase-calcite rodding within a kaersutite xenocryst from the Kakanui mineral breccia, New Zealand

Megacrysts from the Newer Basalts and Other Basaltic Rocks of Southeastern Australia

Feldspar Megacrysts in Alkali Basalts

Composition and Structural State of Feldspar Inclusions from Alkali Olivine Basalt, Potrillo Basalt, Southern New Mexico

Structural changes at room temperature of heated anorthoclases

Physical properties of anorthoclase from antarctica