R. Lena,  M. Cicognani, Pg. Salimbeni, A. Bares, D. DelValle, M. Higashida,  R. Porta .
 
 

In  previous works we reported some considerations about volcanism and tettonic processes on the Moon.  As for domes research the altitude of the sun above the lunar surface is one of the governing factors in the observation of the rilles.
The region of Cauchy  is very complex and holds a great deal of opportunity for the amateur with any telescope to observe the diversity of geological features.  We are documenting some structures in more detail .
Across the north-eastern plains of the Mare  Tranquillitatis lie two near-parallel cracks in the Moon's surface, both more than 200 km long. Rupes and Rima Cauchy (the Cauchy scarp and rille) are named after the bright 12 km diameter impact crater Cauchy that lies between them. Both features were formed after the massive lava flows that formed the maria  had cooled and had begun to settle, and they were caused by a localised stretching apart of the lunar crust. In sunset Rupes Cauchy stood out as a bright line while  it casts a prominent shadow at sunrise.
These  images and drawings are only a representative selection of   these observations and will give a basis for future comparisons.
 

Our observation are as follows:
 

Massimo Cicognani    drawing carried out on 18 august  2000 at 22:30 UT
Seeing  II- III (Antoniadi scale)  refractor 12 cm  f/6.7  ( 213x and  yellow filter W 8 ). Domes Cauchy omega and Tau . Observation carried out at sunset (colongitude 138).
 

N. Biver observation carried out on 10 august 1990 from 2:00 to 4:50 UT Newton 200 mm

Morio Higashida CCD image of the Cauchy region (Newton 200 mms f/6).
 

Daniel Del Valle. Observation carried out (sunset) on 3 january 2002 at 4:19 UT. SCT 20 cm f/10 270x (seeing III Antoniadi ).

A. Bares a CCD image of the region.

Raffaello Lena on december 10 2001 at 17:30 UT Refractor 10 cm f/15 at 250x.
Seeing II Antoniadi.
 

Roberto Porta   drawing carried out on  6 June, 2000 at 19:50 UT
Seeing   III-IV (Antoniadi scale)  SCT 200mms  f/10 ( 180x and 222x yellow filter W 8 ).
 
 
 

Raffaello lena    drawing carried out on  5  april 1999  at 1:00  UT
Seeing   III (Antoniadi scale)  SCT 250 mms  f/10 ( 200x and  yellow filter W 8 ). Cauchy and domes at sunset (colongitude 136.0°).
 
 

Roberto Porta   drawing carried out on  25 June, 2001 at 19:30-20:10 UT
 
Conclusion
The ALPO list reports several domes in the Cauchy region:

 38*30' 05*10' .620 .090 Cauchy
 38*22' 02*35' .620 .045 Cauchy-+610,+042 (25x22)
 38*90' 09*67' .619 -,168 Gutenberg   BAA small, round
 38*49' -09*37 .618 -.167 Gutenberg 13 BAA has 2 craters at summit
 38*12' 03*54' .617 .068 Cauchy 16
 41*12' -20*44' .616 -.354 Santbech 9
 38*19' 07*14' .615 .126 Cauchy 9.6 BAA steep, round dome
 38*03' 03*44' .615 .065 Cauchy 25 BAA (35kms) low, irregular
 40*45' -20*07' .613 -.344 Santbech 4 BAA small, round (east of crater
S)
 40*57' -20*59' .612 -.358 Santbech 9
 37*38' 02*24' .610 .042 Cauchy 30 BAA - low & ill-defined
 38*12' 09*58' .609 .173 Cauchy
 41*12' -22*24' .609 -.381 Santbech 4.1 BAA small, round. To east of
crater S
 41*00' -22*05' .608 -.376 Santbech 9   68 37*47' 08*24' .606 .146
Cauchy
 37*38' 07*07' .606 .124 Cauchy   NDF
 40*41' -22*20' .603 -.380 Santbech 5.5 BAA - steep, hemispherical
 37*43' 10*12' .602 .177 Cauchy 2   72 37*19' 06*47' .602 .118 Cauchy
12x14
 36*56' 03*09' .600 .055 Cauchy .7 BAA low, ill-defined-see +551,+07
 37*32' 10*33' .599 .183 Cauchy
 39*38' -20*07' .599 -.344 Santbech 9.6
 37*05' 08*41' .596 .151 Cauchy
 36*35' 03*09' .595 .055 Cauchy-see +571,+075 30
 38*09' 15*58' .594 .275 Maraldi 1
 36*50' 07*42' .594 .134 Cauchy  2(8)
 39*28' 21*06' .593 .360 Maraldi 6x7
38*46' 18*43' .593 .321  Maraldi
 38*44' 18*36' .593 .319 Maraldi
 36*44' 07*32' .593 .131 Cauchy 10.3 BAA - steep, round dome
 36*31' 05*55' .592 .103 Cauchy 3
 38*26' 18*54' .588 .324 Maraldi
 39*00' 21*21' .586 .364 Maraldi 2
35*58' 06*09' .584 .107 Cauchy
 

Our observations are in progress.
 
 Acknowledgements

We acknowledge the contribution to the observations by N. Biver  for furnishing the drawing.