Laura Kerber

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On the basis of geological evidence, it is often stated that the early martian climate was warm enough for liquid water to flow on the surface thanks to the greenhouse effect of a thick atmosphere. We present 3D global climate simulations of the early martian climate performed assuming a faint young Sun and a CO2 atmosphere with surface pressure between 0.1(More)
MESSENGER observations from Mercury orbit reveal that a large contiguous expanse of smooth plains covers much of Mercury's high northern latitudes and occupies more than 6% of the planet's surface area. These plains are smooth, embay other landforms, are distinct in color, show several flow features, and partially or completely bury impact craters, the(More)
a Geological Sciences Department, Brown University, 324 Brook Street, Box 1846, Providence, RI 02912, USA b Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Road, N.W., Washington, DC 20015, USA c The Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723, USA d Environmental(More)
0019-1035/$ see front matter 2009 Elsevier Inc. A doi:10.1016/j.icarus.2009.10.001 * Corresponding author. Address: Geological Scie Brook St., Box 1846, Providence, RI 02912, USA. Fax: E-mail address: Laura_Kerber@brown.edu (L. Kerb The Medusae Fossae Formation (MFF), covering about 2.1 10 km (with an estimated volume of 1.4 10 km) and straddling the(More)
We use a 3-D general circulation model to compare the primitive Martian hydrological cycle in “warm and wet” and “cold and icy” scenarios. In the warm and wet scenario, an anomalously high solar flux or intense greenhouse warming artificially added to the climate model are required to maintain warm conditions and an ice-free northern ocean. Precipitation(More)
This study evaluated the caries inhibition of dentin primers with the addition of fluoride. Two standardized Class V preparations were placed in 20 molars, the gingival margin placed below the cementoenamel junction and the occlusal margin placed in enamel. Two dentin primers (Syntac and ScotchPrep) were placed in equal numbers of 20 preparations, according(More)
We present a global survey of candidate pyroclastic deposits on Mercury, derived from images obtained during MESSENGER flybys 1–3 that provided near-global coverage at resolutions between 5 and 0.5 km/pixel. Thirty-five deposits were identified and characterized and are located principally on the floors of craters, along rims of craters, and along the edge(More)
We present new observations of pyroclastic deposits on the surface of Mercury from data acquired during the orbital phase of the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) mission. The global analysis of pyroclastic deposits brings the total number of such identified features from 40 to 51. Some 90% of pyroclastic deposits are(More)
Introduction. The Medusae Fossae Formation (MFF) is an enigmatic formation located between 130°-230°E and 12°S-12°N, in the southern parts of the Elysium and Amazonis quadrangles and the northern parts of the Aeolis and Memnonia quadrangles. It covers an area of approximately 2.1 x 10 km and has an estimated volume of 1.4 x 10 km [1]. The formation is(More)
The purpose of this study was to evaluate demineralization inhibition at restoration gingival margins. The study compared the effectiveness of a fluoride-releasing restorative material and topical fluoride regimens utilized individually and in conjunction with fluoridated materials. Glass-ionomer restorations demonstrated significantly less dentin(More)