Martian north polar layered deposits stratigraphy: Implications for accumulation rates and flow
نویسندگان
چکیده
منابع مشابه
Glacial Flow Modeling of the Martian North Polar Layered Deposits
Introduction: Recent observations of the Martian North Polar Layered Deposits (NPLD) suggest that glacial flow may govern its large-scale evolution [1]. There are two basic glaciological questions of climatological importance: (1) How fast is the NPLD presently flowing? (2) And does the NPLD experience " ice ages " : i.e., episodes of glacial advance and retreat at other orbital epochs? To addr...
متن کاملStratigraphic Anomalies in the Martian North Polar Layered Deposits
Introduction: We have identified numerous examples of anomalous trough stratigraphy within the North Polar Layered Deposits (NPLD). According to the standard model of NPLD stratigraphy [1], troughs can be divided into three main units: (1) Layered Terrain, which exhibit fine-scale laminae upon equatorward-facing (EWF) trough slopes; (2) Banded Terrain, more diffuse layers located on poleward-fa...
متن کاملIntegrating radar stratigraphy with high resolution visible stratigraphy of the north polar layered deposits, Mars
Shallow Radar (SHARAD) on board NASA’s Mars Reconnaissance Orbiter has successfully detected tens of reflectors in the subsurface of the north polar layered deposits (NPLD) of Mars. Radar reflections are hypothesized to originate from the same material interfaces that result in visible layering. As a first step towards verifying this assumption, this study uses signal analyses and geometric com...
متن کاملThe Peculiar Stratigraphy of Offset Troughs within the Martian North Polar Layered Deposits – Evidence for Deforma- tion?
Introduction: Deciphering the stratigraphy of the Martian North Polar Layered Deposits (NPLD) may provide critical insight into climatic processes on Mars. Detailed layering is exposed within NPLD troughs, the stratigraphy of which can either simply appear straightlying or manifest in a more complex offset pattern (Fig. 1). Here we examine small-scale variations in the stratigraphy of offset tr...
متن کاملMars north polar deposits: stratigraphy, age, and geodynamical response.
The Shallow Radar (SHARAD) on the Mars Reconnaissance Orbiter has imaged the internal stratigraphy of the north polar layered deposits of Mars. Radar reflections within the deposits reveal a laterally continuous deposition of layers, which typically consist of four packets of finely spaced reflectors separated by homogeneous interpacket regions of nearly pure ice. The packet/interpacket structu...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research
سال: 2006
ISSN: 0148-0227
DOI: 10.1029/2005je002571