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Phillips RJ, Zuber MT, Smrekar SE, et al. Mars north polar deposits: stratigraphy, age, and geodynamical response. Science. 2008;320(5880):1182-5doi: 10.1126/science.1157546.
Phillips, R. J., Zuber, M. T., Smrekar, S. E., Mellon, M. T., Head, J. W., Tanaka, K. L., Putzig, N. E., Milkovich, S. M., Campbell, B. A., Plaut, J. J., Safaeinili, A., Seu, R., Biccari, D., Carter, L. M., Picardi, G., Orosei, R., Mohit, P. S., Heggy, E., Zurek, R. W., Egan, A. F., Giacomoni, E., Russo, F., Cutigni, M., Pettinelli, E., Holt, J. W., Leuschen, C. J., & Marinangeli, L. (2008). Mars north polar deposits: stratigraphy, age, and geodynamical response. Science (New York, N.Y.), 320(5880), 1182-5. https://doi.org/10.1126/science.1157546
Phillips, Roger J, et al. "Mars north polar deposits: stratigraphy, age, and geodynamical response." Science (New York, N.Y.) vol. 320,5880 (2008): 1182-5. doi: https://doi.org/10.1126/science.1157546
Phillips RJ, Zuber MT, Smrekar SE, Mellon MT, Head JW, Tanaka KL, Putzig NE, Milkovich SM, Campbell BA, Plaut JJ, Safaeinili A, Seu R, Biccari D, Carter LM, Picardi G, Orosei R, Mohit PS, Heggy E, Zurek RW, Egan AF, Giacomoni E, Russo F, Cutigni M, Pettinelli E, Holt JW, Leuschen CJ, Marinangeli L. Mars north polar deposits: stratigraphy, age, and geodynamical response. Science. 2008 May 30;320(5880):1182-5. doi: 10.1126/science.1157546. Epub 2008 May 15. PMID: 18483402.
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Science. 2008 May 30;320(5880):1182-5. doi: 10.1126/science.1157546. Epub 2008 May 15.

Mars north polar deposits: stratigraphy, age, and geodynamical response.

Science (New York, N.Y.)

Roger J Phillips, Maria T Zuber, Suzanne E Smrekar, Michael T Mellon, James W Head, Kenneth L Tanaka, Nathaniel E Putzig, Sarah M Milkovich, Bruce A Campbell, Jeffrey J Plaut, Ali Safaeinili, Roberto Seu, Daniela Biccari, Lynn M Carter, Giovanni Picardi, Roberto Orosei, P Surdas Mohit, Essam Heggy, Richard W Zurek, Anthony F Egan, Emanuele Giacomoni, Federica Russo, Marco Cutigni, Elena Pettinelli, John W Holt, Carl J Leuschen, Lucia Marinangeli

Affiliations

  1. Southwest Research Institute, Boulder, CO 80302, USA. [email protected]

PMID: 18483402 DOI: 10.1126/science.1157546

Abstract

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 structure can be explained by approximately million-year periodicities in Mars' obliquity or orbital eccentricity. The observed approximately 100-meter maximum deflection of the underlying substrate in response to the ice load implies that the present-day thickness of an equilibrium elastic lithosphere is greater than 300 kilometers. Alternatively, the response to the load may be in a transient state controlled by mantle viscosity. Both scenarios probably require that Mars has a subchondritic abundance of heat-producing elements.

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