In the final instalment of my posts giving a summary of the northern mid-latitudes of Mars, I will present the Phlegra Montes area, in the easternmost part (if you're working with -180 to 180° longitudes as I am) of the northern hemisphere.
This area has some special interest taken in it lately, with a paper giving evidence for wet-based glaciation in the area written recently
Eskers in a complete, wet-based glacial system in the Phlegra Montes region, Mars (Gallagher and Balme 2015).
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| The HRSC tiles h1423, h1628 and h1412 overlaid on MOC image mosaic and colourised by elevation. |
I use the same elevation colour ramp for HRSC tiles as in Utopia Planitia as follows:
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| MOLA elevation alone. |
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| Hillshaded MOLA elevation. |
Northernmost region:
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| With classifier functions for 'head' and 'extent'. |
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| Two Souness GLFs are just missed by the HRSC coverage. |
A little further south:
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| Relatively few Souness GLFs are found in this area. |
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| In this region the GLFs are often found around relatively small isolated mesas, though many some of these do not host a catalogued GLF and look similar to the classifier. |
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| Close up of region around Souness 167 and 168. |
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| HRSC nadir image. |
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| With classifier function. |
Central region of Phlegra Montes:
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| A number of Souness GLFs are found in this area. |
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| With classifier function |
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| Zooming in a bit more |
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| A little to the south of the previous image |
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| Further to the south again |
Southern Phlegra Montes area
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| This covers the same region as the study areas of the Gallagher and Balme 2015 paper. They postulate wet-based glaciation in this area, arguing this was made possible by geothermal heat flux. |
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| Nadir images. |
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| With the classifier. |
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| The detailed study area from the paper at ~163°E, 32.5°N, with a lineated valley fill at the left and the postulated wet-based glacial forms including sinuous ridges near the centre of this image. |
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| HRSC nadir image |
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| With the classifier. |
