The fossil pieces of " Runcaria heinzelinii " that have been found are short branched stems that at their tips have a radially symmetrical megasporangium surrounded by a cupule.
42.
It can take one minute to create a 12 mm deep cupule on weathered sandstone, but 45, 000 and 60, 000 hammer-stone strokes on unweathered quartzite.
43.
Oaks have spirally arranged leaves, with cupule; each acorn contains one seed ( rarely two or three ) and takes 6 18 months to mature, depending on their species.
44.
The female flowers produce beechnuts, small triangular nuts long and wide at the base; there are two nuts in each cupule, maturing in the autumn 5 6 months after pollination.
45.
The products of KEM were first identified in 2015 in cupules, a form of rock art consisting of spherical cap or dome-shaped depressions created by percussion with hammer-stones.
46.
"' Cupules "'( " kyoo'pyools " ) are humanly made depressions on rock surfaces that resemble the shape of a spherical cap or dome.
47.
The kinetic energy applied in the production of cupules can be determined experimentally, kinetic energy " Ek " being the ability of a mass in motion to have a physical effect:
48.
This cumulative application of focused force has occasionally led to kinetic energy metamorphosis ( KEM ) in sedimentary siliceous rocks, a phenomenon first identified in cupules but since recognized in many geological contexts.
49.
The acorns are long, and about one-third to one-half enclosed by a cap or cup ( cupule ); they mature in September, turning from green to golden brown.
50.
The cupules may be purely decorative; they could be primitive calendars, each circle marking off a day, a lunar cycle or other natural rhythms, or they may represent some other counting system.
