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Le Moustoir

(8)

Petit Mont:

+(e +

i) set, and toward Kerran

There is what Thom and Thom describe as an "extrapolating sector" near St. Pierre, and there are tumuli at Le Moustoir and at sites very close to Petit Mont and Tumiac.

Thom and Thom find values of G of 114ft for Le Moustoir and 94 ft for Kervilor. These sites could have provided extrapolation sites for the southernmost major standstill moonrise. From the proposed site of the northernmost major standstill moonrise alignment, ~1km south of St. Pierre, there is no record of stones or other indications of a backsight, but the radius of the sector at St. Pierre is ~700ft, which compares with the computed value of 4G for the site, 720 ft. Although Thom and Thom do not seem to have been aware of it, reports from the last century make it certain that the rows were once much longer and have been partially submerged by the sea (Burl 1993).

Thom and Thom deduced a value for the obliquity that indicated a date near 1580 b.c., but the uncertainties in measurement permitted an even later date. At the date of their work, the hypothesis that the Grand Menhir had been a major lunar foresight at 1580 b.c. or later seemed reasonable. DHK, however, agrees with Burl (1993) that the archaeological evidence now makes the proposal utterly unlikely and that the Brittany study provides a very good example of the dangers of accidental alignments when the monuments being examined are not part of a single complex.

In addition to these interesting features, there are several local sites of stone rows in the area, which can be examined separately:

(1) Le Menec stone rows

(2) Kermario stone rows

(3) Petit menec stone sectored grid

(4) St. Pierre sector

(5) Champ de menhirs

The Le Menec row and Kermario rows are in the north of the Carnac region proper. The Le Menec rows show a distinct direction shift about midway of its overall length, ~3000ft or ~1km. The Kermario rows, of similar overall length, to the northeast, show three such areas, but the westernmost is short, ~100m. The width of both of these sets of rows is also ~100m. Further to the northeast, near Kerlescan, there is another, much shorter sector oriented roughly eastward, toward Petit Menec. The sector at Petit Menec is shorter still; Thom and Thom (1971, Fig. 5) give its overall length ~93.6m or 112MY, and compute its radius as 225MY, and its broad base consisting of 14 squares with sides of length 4 MY is 56 MY on the arc. The previously mentioned St. Pierre sector (Thom and Thom 1971, Fig. 6) seems to have squares of 10 MY sides at the base, 40 MY on the arc.

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