Spirit sends one of those pictures that looks like it could come from the red rock deserts of the American West, but actually shows part of the landscape in Gusev crater, a mere 60 million miles away. Credit: NASA
The dune field at the center of Victoria Crater, seen in a new false-color shot. Credit: NASA
Located in far northwest Sonora, Mexico, the Pinacate volcanic field comprises a 1,500 km2 area of Pleistocene lava flows with over 400 cinder cones and 8 maars.
The volcanoes in the Pinacate are monogenetic—meaning they erupt only once and each have a unique magmatic signature. The field today is part of El Pinacate and Gran Desierto de Altar Biosphere Reserve and is also a UNESCO World Heritage Site.
The eastern portion of the field—which is accessible by a vehicle tour route—contains the youngest cones and is mantled by an extensive tephra deposit. One of the most impressive features on the vehicle route is a large maar caldera, Crater Elegante, formed 32 thousand years ago in an explosive eruption when groundwater interacted with magma. The caldera measures nearly a mile in diameter and is the largest maar in the field.
The cinder cones are accompanied by extensive basaltic lava flows, some of which form spiky stiff peaks. Due to the arid, desert setting of the field, most of the cones have experienced very little erosion and retain a relatively youthful morphology. Extensive dune fields surround the volcanic complex, providing a stark visual contrast to the dark basalt rocks.
Top image from Dan Lynch, all other images by author
Namib Desert, Namibia, Africa One of the driest regions on Earth, the Namib Desert, Namibia, Africa (23.0N, 15.0E) lies adjacent to the Atlantic coast but the upwelling oceanic water causes a very stable rainless atmosphere. The few local inland rivers do not reach the sea but instead, appear as long indentations where they penetrate the dune fields and end as small dry lakes. The vast dune fields are the result of sands deposited over millions of years by the stream flow.
Are you familiar with the Catholic University of Valparaiso's (PUCV for short) architecture school? Any thoughts on it?
PUVC is famous for its teaching and research participation on
Ciudad Abierta de Ritoque (Open City of Ritoque). As described in MIMOA:
La Ciudad Abierta de Ritoque is a settlement of 270 hect. located 16 kms. north of Valparaiso. The land includes extensive dune fields, wetlands with an extraordinary diversity of flora and fauna, an edge of the beach, streams and fields. Founded in 1970 by poets, philosophers, sculptors, painters, architects and designers, is today inhabited by many of them. The students of the architecture faculty Pontificia Universidad Católica de Valparaíso co-participate actively in it’s ongoing construction through workshops. Living in the Open City means to be a partner of Corporación Cultural Amereida and therefore have a degree of detachment, because nobody owns, and each input and construction that takes place is a gift. The original idea was to found something of a city, but not in relation to the number of people who live there, but its structure, which should contain the unusual, the des-order. The land chosen is as fluid as the dunes. It’s not strong, it is at the mercy of the wind.
Overflight of an erg in the Arabian Desert - watch for a road in the second half of the clip to give it some scale. Check out how the crests of the dunes and their directions change - an indication of inconsistent wind directions across this dune field.
Aerial view looking down onto a wind-blown dune field inside an unnamed, 48 km-wide impact crater in the southern highlands of Mars. A smaller crater to the right also hosts dunes.
The images were acquired by the High Resolution Stereo Camera on Mars Express on 16 May 2017 during Mars Express orbit 16934. The ground resolution is about 13 m/pixel and the images are centred on 248°E / 59°S. North is to the right.
The colour image was created using data from the nadir channel, the field of view which is aligned perpendicular to the surface of Mars, and the camera’s colour channels.
San Francisco between 1896 and 1911. 2.
Long Beach, New York between 1911 and 1942.
Arnold Genthe (January 8, 1869 – August 9, 1942) was a German-born American photographer, best known for his photographs of San Francisco’s Chinatown, the 1906 San Francisco earthquake, and his portraits of noted people, from politicians and socialites to literary figures and entertainment celebrities.
Arnold Genthe was born in Berlin, Prussia, to Louise Zober and Hermann Genthe, a professor of Latin and Greek at the Graues Kloster (Grey Monastery) in Berlin. Genthe followed in his father’s footsteps, becoming a classically trained scholar; he received a doctorate in philology in 1894 from the University of Jena, where he knew artist Adolf Menzel, his mother’s cousin.
After emigrating to San Francisco in 1895 to work as a tutor for the son of Baron and Baroness J. Henrich von Schroeder, he taught himself photography. He was intrigued by the Chinese section of the city and photographed its inhabitants, from children to drug addicts. Due to his subjects’ possible fear of his camera or their reluctance to have pictures taken, Genthe sometimes hid his camera. He also sometimes removed evidence of Western culture from these pictures, cropping or erasing as needed. About 200 of his Chinatown pictures survive, and these comprise the only known photographic depictions of the area before the 1906 earthquake.
After local magazines published some of his photographs in the late 1890s, he opened a portrait studio. He knew some of the city’s wealthy matrons, and as his reputation grew, his clientele included Nance O'Neil, Sarah Bernhardt, Nora May French, and Jack London. In 1904 he traveled to Western Europe and Tangier with the famous watercolorist, Francis McComas.
In 1906, the San Francisco earthquake and fire destroyed Genthe’s studio, but he rebuilt. Within a short time, Genthe joined the art colony in Carmel-by-the-Sea, where he fraternized with the literary elite, including George Sterling, Jack London, Harry Leon Wilson, Ambrose Bierce, and Mary Austin. Here he was able to pursue his work in color photography. Of his new residence, he wrote, “The cypresses and rocks of Point Lobos, the always varying sunsets and the intriguing shadows of the sand dunes offered a rich field for color experiments.” Although his stay in Carmel was relatively short (1905–07), he was appointed in 1907 to the Board of Directors of the Art Gallery in Monterey’s luxury Hotel Del Monte, where he insured that the work of important regional art photographers, such as Laura Adams Armer and Anne Brigman, was displayed with his own prints. By the spring of 1907 he had established his residence and studio at 3209 Clay Street in San Francisco, where he continued to enjoy membership in the celebrated Bohemian Club, attend prominent society functions, display his own work, and pen newspaper reviews of photo and art exhibitions.
In 1911 he moved to New York City, where he remained until his death of a heart attack in 1942. He worked primarily in portraiture, and Theodore Roosevelt, Woodrow Wilson, and John D. Rockefeller all sat for him. His photos of Greta Garbo were credited with boosting her career. He also photographed modern dancers, including Anna Pavlova, Isadora Duncan, and Ruth St. Denis, and his photos were featured in the 1916 book, The Book of the Dance.