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"Dingus, Lowell"
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Barnum Brown
From his stunning discovery of Tyrannosaurus rex one hundred years ago to the dozens of other important new dinosaur species he found, Barnum Brown led a remarkable life (1873-1963), spending most of it searching for fossils--and sometimes oil--in every corner of the globe. One of the most famous scientists in the world during the middle of the twentieth century, Brown--who lived fast, dressed to the nines, gambled, drank, smoked, and was known as a ladies' man--became as legendary as the dinosaurs he uncovered. Barnum Brown brushes off the loose sediment to reveal the man behind the legend. Drawing on Brown's field correspondence and unpublished notes, and on the writings of his daughter and his two wives, it discloses for the first time details about his life and travels--from his youth on the western frontier to his spying for the U.S. government under cover of his expeditions. This absorbing biography also takes full measure of Brown's extensive scientific accomplishments, making it the definitive account of the life and times of a singular man and a superlative fossil hunter.
eBook
Barnum Brown
From his stunning discovery of Tyrannosaurus rex one hundred years ago to the dozens of other important new dinosaur species he found, Barnum Brown led a remarkable life (1873–1963), spending most of it searching for fossils—and sometimes oil—in every corner of the globe. One of the most famous scientists in the world during the middle of the twentieth century, Brown—who lived fast, dressed to the nines, gambled, drank, smoked, and was known as a ladies' man—became as legendary as the dinosaurs he uncovered. Barnum Brown brushes off the loose sediment to reveal the man behind the legend. Drawing on Brown's field correspondence and unpublished notes, and on the writings of his daughter and his two wives, it discloses for the first time details about his life and travels—from his youth on the western frontier to his spying for the U.S. government under cover of his expeditions. This absorbing biography also takes full measure of Brown's extensive scientific accomplishments, making it the definitive account of the life and times of a singular man and a superlative fossil hunter.
eBook
Extraordinary preservation in a new vertebrate assemblage from the Late Cretaceous of Mongolia
WE report here a new locality, Ukhaa Tolgod ('brown hills'), from the Upper Cretaceous of the Gobi Desert of Mongolia, which shows an unmatched abundance of well preserved vertebrate fossils, including the highest concentration of mammalian skulls and skeletons from any Mesozoic site. In the main collecting area (about 4 km
2
), recovered and uncollected articulated skeletons of thero-pod, ankylosaurian and protoceratopsian dinosaurs represent over 100 individuals. Specimens collected also include skulls (many with associated skeletons) of over 400 mammals and lizards, skeletons (including the first known skull) of the bird
Mononykus
, and nest sites that preserve the first known theropod dinosaur embryos
1
. In contrast to other Mesozoic localities, the diversity and abundance of theropods, mammals and lizards are unusually high. The exceptional preservation of vertebrates from the red-bed facies of the Gobi Upper Cretaceous has been attributed to arid conditions2–4, possibly involving catastrophic death and burial during major sandstorms
5
. Although fossils are found in fluvial facies at Ukhaa Tolgod, high concentrations of excellent specimens in aeolian facies support the argument for rapid entombment in sand. This contrasts with conditions for the terrestrial Upper Cretaceous in North and South America, where accretionary preservation of fossils in fluvial deposits predominates.
Journal Article
Barnum Brown
From his stunning discovery ofTyrannosaurus rexone hundred years ago to the dozens of other important new dinosaur species he found, Barnum Brown led a remarkable life (1873-1963), spending most of it searching for fossils-and sometimes oil-in every corner of the globe. One of the most famous scientists in the world during the middle of the twentieth century, Brown-who lived fast, dressed to the nines, gambled, drank, smoked, and was known as a ladies' man-became as legendary as the dinosaurs he uncovered.Barnum Brownbrushes off the loose sediment to reveal the man behind the legend. Drawing on Brown's field correspondence and unpublished notes, and on the writings of his daughter and his two wives, it discloses for the first time details about his life and travels-from his youth on the western frontier to his spying for the U.S. government under cover of his expeditions. This absorbing biography also takes full measure of Brown's extensive scientific accomplishments, making it the definitive account of the life and times of a singular man and a superlative fossil hunter.
eBook
Mud-filled Ophiomorpha from Upper Cretaceous continental redbeds of southern Mongolia; an ichnologic clue to the origin of detrital, grain-coating clays
At Flaming Cliffs-a famous vertebrate locality in southern Mongolia - sand grains in red sandstones of fluvial and eolian origin within the Upper Cretaceous Djadokhta Formation are coated with detrital clay. The nearest correlative marine deposits are thousands of kilometers distant. Structureless sandstones with stringers and lenses of reworked caliche pebbles lie laterally adjacent to sets of eolian cross-strata up to 20 m thick. These pebbly sandstones, interpreted as the deposits of intermittent streams that occupied interdune positions, contain abundant Ophiomorpha. Burrows are 1 to 3 cm in diameter, with a knobby exterior. The traces occur not only as simple tubes, but also as Teichichnus-like spreiten, produced by the systematic upward and lateral migration of a spiral burrow. Spreiten can reach vertical extents greater than 3 m and widths of 30 cm. Although they commonly appear in stratal sequences that contain no mudstone beds, many of the burrows are filled by mud. The best modern analog is provided by freshwater crustaceans that excavate deep burrows to the water table in order to escape desiccation during drought. Mud was emplaced during fluvial flood events when the open, near-vertical shafts acted as storm sewers through the vadose zone. Spreiten probably were generated by systematic offsets from the original burrow axis during repeated re-excavations. One mechanism for emplacing detrital clays in sandstones calls upon infiltration of muddy water through the vadose zone during flood events. The burrow fills within the fluvial facies of the Djadokhta Formation provide corroborative, independent evidence for the passage of muddy water through the strata. Like the Callianassa burrows that fill with coarse, shelly debris during the passage of Caribbean hurricanes (\"tubular tempestites\"), burrows in continental settings also can provide unique testimony to important depositional events and early diagenetic processes.
Journal Article
