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Segment 5
A FF - crater Posidonius, Lava borders in Mare
Tranquilitatis, The Apollo 17 region with its pyroclastic deposits and the
lunar cones Isis and Osiris. Segment 5 B Gardner megaplateau,
Domefield Cauchy west, Jansen and Carrel, Menelaus and Arago Segment 5 C Hyginus,
Murchison, Manilius and Yangel (Sinus Fidei) Segment 5
D Aristillus, Autolycus, Rima Hadley (Apollo 15), Palus
Putredinus, Valentine Dome |
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Moon age 7.5 - 8.8 days - Illumination 44 - 59 %
Hyginus Region Domes
Manilius and Yangel 1 NEW 2016 Manilius und Yangel 1 NEW 2016
Animation Domes Manilius and Yangel in a time
differnce of 24h illumination |
Moon age 8.5 - 8.8 days -
Illumination 54 - 59 %
Hyginus region Murchison NEW 2016 Murchinson NEW 2016 Domes Manilius and Yangel
1 NEW
2016 Pyroclastic deposit Sinus Aestum
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Hyginus region - Moon age 7.5 days (44 %)
Hyginus and Triesnecker are probably one of the
most exciting landscapes on the front of the Moon. The whole area in the north
of Triesnecker is interpreted as a complex volcanic area. Hyginus (10.5 km) is
interpreted as one of the few larger structures, as a volcanic caldera. It is
located on a 35 km wide but extremely flat hump (Hyginus 2) with a height of
only 30 meters which can not be seen in this image.
Further to the north
there is a small effusive dome - Hyginus 1. It has a diameter of just over 9
kilometers and a summit vent at a height of about 70 meters. The rille to the
west and east of Hyginus is about 1.5 to 2 kilometers deep. The Hyginus rille
is roughly parallel to the Rima Ariadaeus and both point to the center of the
Imbrium basin. |
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Hyginus region + pyroclastic deposit
Mare Vaporum - Moon age 7.5 days (44
%)
The mountainous terrain
north of Hyginus is covered with a layer of volcanic ash and named Mare Vaporum
pyroclastic deposit, one of the largest deposits on the front of the
moon.
The entire area is widely
covered with ejecta of the Imbrium impact event. |
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LRO height profile of Hyginus and
Hyginus A
One of the
strong arguments to classify Hyginus as a volcanic caldera and not as a normal
impact crater can be found in its height profile. While even much smaller
craters, as in the example Hyginus A, show a clear crater wall there is no wall
at Hyginus.
The image to the left shows a comparison of the height
profiles of Hyginus and Hyginus A. It was measured in LRO images with a
resolution of 125 m/px. |
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NEW 2016 Manilius and Yangel Dome - Moon age 7.5 days
(44 %)
West of Manilius (39 km) are two very different domes and some
dark halo craters. Manilius 1 is a flat dome with a diameter of about 10
kilometers and a height of 180 meters. Its flank angle is approximately 2
degrees. It is very similar to the C2 domes in Mare Traquilitatis such as
Cauchy Tau and Omega. Several summit openings are visible. East of Ma 1 three
other putative dome structures are visible, marked with 1 , 2 , 3 and 4. Number
5 marks a dark halo crater.
Yangel 1 is a small steep cone with a diameter 5 kilometers and a
height of 620 meters. It was built over a period of several years of very
slow-moving lava. Afterwards its surface was covered with a layer of
pyroclastic ash. Its flank angle is approximately 13.5 degrees and it is
similar to the dome Liebig 1 and the domes of the Marius Hills. In this
illumination situation Yangel throws 1 a spectacular shadow. |
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Just south
of the crater Yangel the Rima Yangel intersects an isolated hilly area. Yangel
X is another dome-like structure, see the following two LRO
images. |
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NEW 2016 LRO
Manilius 1 - 4 and
Yangel Dome
X
« «LRO image with a
resolution of 125m/px of the 4 putativen domes. Also marked is the dark halo
crater with a diameter of about 2 kilometers. Dome 4 is similar to the Dome
Kies phi and the Hortensius domes. There is another caldera with pyroclastic
deposits in north-westerly direction.
« This LRO image shows
the putative dome Yangel X at a resolution of 32 m / px. It has a size of 3.5 x
5km and a height of about 170m. |
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Manilius and Yangel dome - Moon age 7.5 days
(44 %)
West of Manilius
(39 km) are two very different domes and some dark halo craters. Manilius 1 is
a flat dome with a diameter of about 10 kilometers and a height of 180 meters.
Its flank angle is approximately 2 degrees. It is very similar to the C2 domes
in Mare Traquilitatis such as Cauchy Tau and Omega.
Yangel 1 is
a small steep cone of 5 kilometers in diameter and with a height of 620 meters.
It was formed over a period of several years by very slow-moving lava. Its
surface was then covered with a layer of pyroclastic ash. Its flank angle is
approximately 13.5 degrees and it is similar to the dome Liebig 1 and the domes
of the Marius Hills. |
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NEW 2016 Manilius and Yangel
Dome
The
image shows an animation of the Dome Manilius 1 and Yangel 1 and compared the
illumination situation at an intervals of 24 hours. Pay attention to the
differences in the shadows of the dome Yangel 1 and the visibility of the
wrinkle ridges in Mare Vaporum and the dome Manilius 1. |
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Hyginus region and Mainilius domes -
Moon age 7.8 days (48 %)
The mosaic shows Hyginus 1 (summit crater) and
Manilius 1 at an illumination of 48 %, almost exactly in the crescent phase.
Manilius 1 shows two small summit craters. Directly to the east there is an
object marked with a question mark. We would classify it as a putative dome. It
is similar to Yangel 1 but much smaller.
The Mare Vaporum pyroclastic
deposit is clearly visible in this image. |
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Moon age
8.5 days - Illumination 54 % |
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Hyginus region + Pyroclastic deposit
Mare Vaporum - Moon age 8.5 days (54
%)
The Mare Vaporum
pyroclastic deposit can be very good seen in this image.
The more than
15 small craters which overlap Rima Hyginus must have been formed after the
ceiling collapse of the lava channel. |
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Murchison - Moon age 8.5 days (54 %)
Inside of the crater Murchison (58 km), which is
located in the Sinus Medii, are two putative domes - Murchison Murchison 1 and
2. Mu 1 shows under appropriate illumination a small summit crater and it is
bigger than Mu 2. Mu 1 has a diameter of about 8.5 kilometers and a height of
about 200 meters, Mu 2 is significantly smaller with 6 kilometers in diameter
and a height of 140 meters.
Near the crater Ukert (23 km) you can see
remnants of the large Imbrium impact event. The parallel structures are aligned
on the Imbrium center and can be traced in straight lines to the large craters
Ptolemy and Albategnius. The term "Imbrium Sculpture" was introduced in the
middle of the last century by Gilbert, a lunar geologist. |
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Murchison - Moon age 8.5 days (54 %)
Murchison 1 and 2 together with the pyroclastic
deposits of the Mare Vaporum. |
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Murchison - Moon age 8.5 days (54 %)
Murchison 1 and 2 at similar
illumination. |
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Moon age
8.8 days - Illumination 59 % |
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NEW 2016 Murchison - Moon age 8.8 days (59 %)
Murchison 1 and 2, together with
the pyroclastic deposits of Mare Vaporum, at increasing illumination. Below the
image center around the crater Ukert are structures of the "Imbrium Sculpture".
Murchison 2 is putative. |
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NEW 2016 Yangel 1 - Moon age 8.8 days (59 %)
The dome Manilius 1 (nearly
unvisible) and Yangel 1 at a moon age of about 9 days. The two pyroclastic
areas in Mare Vaporum and Sinus Aestum are visible. |
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All Images - otherwise marked - and all Content are
© by Franz Hofmann + Wolfgang Paech |