On this coordinates is forgotten quarry, which was strategic
object before WWII. Quarried rock was used for concrete
czechoslovak´s
forts.
The desribe
of quarried rock
This rock is a dark, coarse-grained, intrusive igneous rock
chemically equivalent to basalt. It is a plutonic rock, formed when
molten magma is trapped beneath the Earth's surface and cools into
a crystalline mass. The vast majority of the Earth's surface is
underlain by rock within the oceanic crust, produced by basalt
magmatism at mid-ocean ridges. This rock is dense, greenish or
dark-colored and contains varied percentages of pyroxene,
plagioclase, amphibole, and olivine(olivine rock when olivine is
present in large quantities). The pyroxene is mostly clinopyroxene;
small amounts of orthopyroxene may be present. If the amount of
orthopyroxene is substantially greater than the amount of
clinopyroxene, the rock is then a Norite. Quartz rocks are also
known to occur and are probably derived from magma that was
over-saturated with silica. Essexites represent rocks whose parent
magma was under-saturated with silica, resulting in the formation
of the feldspathoid mineral nepheline. (Silica saturation of a rock
can be evaluated by normative mineralogy). Rocks contain minor
amounts, typically a few percent, of iron-titanium oxides such as
magnetite, ilmenite, and ulvospinel. This rock is generally coarse
grained, with crystals in the size range of 1 mm or greater. Finer
grained equivalents of rock are called diabase, although the
vernacular term microrock is often used when extra descriptiveness
is desired. This rock may be extremely coarse grained to
pegmatitic, and some pyroxene-plagioclase cumulates are essentially
coarse grained rock, although these may exhibit acicular crystal
habits. This rock is usually equigranular in texture, although it
may be porphyritic at times, especially when plagioclase oikocrysts
have grown earlier than the groundmass minerals.
For
the valid "cache found" log:
1)send me via profile e-mail answers to next questions:
a) Send me name of the quarried
rock
b) Process of rock formation
c) Send me color of this quarried
rock.
2) You have to upload a photo of You with GPS
from both places !!!
a) forgotten quarry
b) your find final deposit of
quarried rock (N 50 20.992 E16 18.463)