mother rock

mother rock

[′məth·ər ‚räk]
(geology)
References in periodicals archive ?
Decomposed granite can be found in nature and the impurities in the mother rock can add colour to the blemishes.
A quarter of a kilogram, hewn from Mother Rock 70017 in 1972, was split into 1.
We came to a short hill, and after we had reached the top we saw a group of white farm buildings, built just off the road, in the mother rock of the hill.
The dislocation fill with prevailing clayey matrix is equal to clay slate as a mother rock whilst sandy fills with low clay content equal to the Skalka quartzite.
Then too you will be interested to know that there are many glacial boulders on the island and shore, of a granitic structure similar to the granite of Scotland, so it looks as if they were brought by the ice during the Glacial epoch from their mother rock away off to the northwest in Scotland.
However, mapping of the area has been done by the PMDC but so far the mother rock has not yet been identified.
Nour's mother rocks the baby as she tells of the kind of loveless wedding that happens here every day.
But I don't think that was exported to the Philippines because Mother's Day was officially set here in 1921 on the first Monday of December, until it was changed by President Manuel Quezon in 1937 when fathers demanded a holiday, too, based on the universal belief that while the mother rocks the cradle, the father builds the home for the safety, comfort, and happiness of the family.