feldspars
71Mars Pathfinder — Pathfinder and Sojourner at JPL in October 1996 Operator NASA – JPL Mission type Lander, rover …
72Thermoluminescence dating — Thermoluminescence (TL) dating is the determination by means of measuring the accumulated radiation dose of the time elapsed since material containing crystalline minerals was either heated (lava, ceramics) or exposed to sunlight (sediments). As… …
73Volcanic rock — is an igneous rock of volcanic origin. Texture Volcanic rocks are usually fine grained or aphanitic to glassy in texture. They often contain clasts of other rocks and phenocrysts. Phenocrysts are crystals that are larger than the matrix and are… …
74Namib-Naukluft National Park — IUCN Category II (National Park) …
75Mount Thielsen — s eroded crater from Diamond Lake Elevation 9,184 ft …
76Catskill Mountains — Geobox|Range name =Catskill Mountains image size =300 image caption =Slide Mountain and the peaks around it as seen from Twin Mountain in the northern Catskills. country =USA state =New York region =Hudson Valley region1 = district type =Counties …
77Leucite — is a rock forming mineral composed of potassium and aluminium tectosilicate K [AlSi2O6] . Crystals have the form of cubic icositetrahedra but, as first observed by Sir David Brewster in 1821, they are not optically isotropic, and are therefore… …
78Aplite — (pronEng|ˈæplaɪt) in petrology, the name given to intrusive rock in which quartz and feldspar are the dominant minerals. Aplites are usually very fine grained, white, grey or pinkish, and their constituents are visible only with the help of a… …
79Reginald Aldworth Daly — Infobox Scientist name = Reginald Aldworth Daly box width = image width =150px caption = Reginald Aldworth Daly birth date = March 18,1871 birth place = death date = September 19,1957 death place = residence = citizenship = nationality =Canadian… …
80Poopó Lake — Infobox lake lake name = Lake Poopó image lake = Poopo 1991.jpg caption lake = coords= coord|18|33|S|67|05|W|type:waterbody region:BO|display=inline,title location= Altiplano basin countries= Bolivia image bathymetry = caption bathymetry = type …
