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Much of the activity at station 4 was devoted to the boulders shown in this photograph. These boulders are basalts and represent material excavated during the formation of Dune Crater. The crew reported that vesicles were abundant in the boulders at this location and that some vesicles were as large
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basalt. Vesicles appear to grade in size and abundance across the rock. One surface is coated by light yellowish-gray material grading into very dark brownish-gray coating at one edge. The rock is porphyritic with brown pyroxene prisms to 10 mm long in a groundmass of plagioclase laths and
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clasts bigger than 1 mm. Sizes are seriate and the rock contains 10 to 15% leucocratic clasts 0.5 to 1.0 mm. Dark, vesiclar glass in sharp contact with the breccia covers parts of four sides of the rock. The medium-gray matrix is coherent.
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Samples 15470 to 15476 were collected near where the rover was parked to the south of the rim of Dune. Samples 15485, 15486, and 15499 were collected from the largest boulder in the photograph above. Sample 15498 was collected nearby.
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Blocky, angular, porphyritic basalt with brown pyroxene phenocrysts to 7 mm long in a slightly vuggy groundmass of plagioclase laths and pyroxene. Light greenish gray material coats the surface.
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Blocky, angular basalt with brown pyroxene prisms to 7 mm long in a moderately vuggy groundmass of flow-aligned plagioclase 2 to 3 mm long, and green-brown mafic silicates
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as 9 cm in diameter. The abundance and size of the vesicles in these boulders suggest that this basaltic material cooled on or very near the lunar surface. (NASA Image and caption)
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Apollo 15 Preliminary
Science Report, NASA SP-289. Prepared by NASA Manned Spacecraft Center, 1972.
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The following samples were collected from Dune Crater (Station 4), as listed in Table 5-II of the
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Dune is located about 1.8 km east of Hadley Rille, less than 1 km south of the smaller
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Blocky, subangular, vuggy basalt with dark-brown pyroxene prisms to 10 mm long in vugs.
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to 15 mm long in a slightly vuggy groundmass of plagioclase, and brown and green
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257:. Sample type, lithology, and description are from Table 5-IV of the same volume.
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2. The south rim of Dune was designated
Geology Station 4 of the mission.
496:, Gazetteer of Planetary Nomenclature, International Astronomical Union (
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crater, and about 3 km south of the Apollo 15 landing site itself.
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at right. This is part of Pan D-6 in the planimetric map below.
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basalt with pale green prisms to 15 mm long in a slightly
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A blocky, angular glass-coated breccia with approximately 10%
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at station 6A facing north shows Dune in the foreground. The
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Slabby, subangular, porphyritic basalt with brown pyroxene
500:) Working Group for Planetary System Nomenclature (WGPSN)
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laths approximately 2 mm long and pale yellow-green
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172:The crater was named by the astronauts after the
510:Dreamer of Dune: The Biography of Frank Herbert
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142:visited the south rim of it in 1971, on the
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310:Blocky, angular, medium-coarse-grained,
227:rims or other topographic features, and
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294:Collected with samples 15475 and 15476
191:Planimetric map of Station 4 from the
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255:Apollo 15 Preliminary Science Report
199:indicates sample locations, 5-digit
193:Apollo 15 Preliminary Science Report
512:, by Brian Herbert, 2004, page 244.
104:A telephoto view from the slope of
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157:Dune crater, facing north, with
34:Apollo 15 panoramic camera image
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115:is near the center, and the
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215:(dot indicates TV camera),
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546:Impact craters on the Moon
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449:Blocky, angular, highly
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94:Astronaut-named feature
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134:region. Astronauts
471:Apollo 15 Traverses
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19:Feature on the moon
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130:, a crater in the
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16:Crater on the Moon
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219:are large rocks,
119:is beyond the LM.
106:Mons Hadley Delta
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541:LQ12 quadrangle
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132:Hadley–Apennine
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465:External links
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63:26.04°N 3.66°E
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423:leucocratic
341:phenocrysts
320:plagioclase
312:porphyritic
279:Description
217:black spots
213:lunar rover
159:Mons Hadley
140:James Irwin
136:David Scott
68:26.04; 3.66
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41:Coordinates
535:Categories
478:References
454:pyroxene.
347:silicates
174:1965 novel
167:Earthlight
451:vesicular
274:Lithology
235:stations.
229:triangles
209:rectangle
184:in 1973.
144:Apollo 15
324:pyroxene
233:panorama
80:Diameter
417:breccia
240:Samples
201:numbers
51:26°02′N
446:basalt
398:basalt
380:basalt
362:basalt
336:basalt
306:basalt
264:Sample
225:crater
113:Falcon
90:Eponym
54:3°40′E
431:15499
406:15498
388:15495
370:15486
352:15485
345:mafic
330:15476
316:vuggy
299:15475
269:Photo
84:380 m
494:Dune
291:soil
231:are
223:are
203:are
138:and
128:Moon
124:Dune
23:Dune
498:IAU
211:is
205:LRL
195:.
182:IAU
176:by
148:EVA
537::
517:^
486:^
110:LM
333:-
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197:X
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