BOX ROCK CIRCUS
Crystalline climbing block Side 4
Lava
Iceland
Slate House
Slate from Spain
on this side
(see Side 1)
Lower recreation ground, Box, Wiltshire SN13 8NT
CRYSTALLINE CLIMBING BLOCK
Lava bomb
(see Side 3)
Side 1
Marble
metamorphosed
limestone
Slate
low-grade
metamorphism
from mudstone,
Penrhyn
Wales
Larvikite
(Syenite)
Emerald Pearl
Norway
(see Side 3)
Gneiss
high-grade
metamorphism
from mudstone
with light and
dark bands
Marble
metamorphosed
limestone
Gneiss
/Granulite
same as
top shelf
Side 1
Slate
metamorphosed
mudstone,
Broughton
Moor, Cumbria
Diorite
Schist - medium-grade
cooled slowly from an iron- metamorphism from mudstone.
rich magma
Folding indicates considerable
deformation. Scotland
Gneiss/
Granulite
same as
top shelf
Side 1
IGNEOUS ROCKS - black METAMORPHIC ROCKS - blue
The project has been mostly funded by a Landfill Communities Fund grant from
The Hills Group Limited through Community First, the Community Council for Wiltshire.
The Third party contribution has been received from the Corsham Area Board.
Fossil rubbings have been provided by the Curry Fund, Geologists’ Association
Full details of other generous donations can be seen on the website.
http://www.boxrockcircus.org.uk
Slate House - slate is metamorphosed
mudstone - low grade metamorphism.
Volcanic bomb
The slates on the roof on this side are
with gas bubbles Penrhyn, from Wales. They show how
inside, Moon's Hill slating is done - each course overlaps the
Quarry, Mendip
slate two courses below. The nicks in the top
Hills, Somerset
slate indicates where the next joint would be.
Lava
Iceland
Collection of
lava, some with
gas bubbles
Granite
Baltic Brown
round feldspars
rapakivi texture
Precambrian
c.1,630 million
years old.
Finland
Gneiss/
Granulite
high grade
metamorphism
Crema Franca
Shivakashi,
India
Obsidian
volcanic glass
Gneiss
Verde Laguna
red crystals are
garnets.
Turkey
Larvikite
(Syenite)
iridescent
feldspar crystals
Blue Pearl
Norway
Anorthosite
Blue Eyes
blue labradorite
feldspars.
Newfoundland
Marble
metamorphosed
white limestone
(e.g. chalk).
Carrara, Italy
Serpentine,
Lizard,
Cornwall
Gabbro cooled slowly
from iron-rich
magma- large
iridescent
feldspars,
Brazil
Granite cooled from
silica-rich
magma
large feldspar
crystals
formed first
IGNEOUS ROCKS - black
Granulite
metamorphosed
several times
Blue Anatra,
Brazil
Marble
metamorphosed
limestone
Dolerite
crystallised from
iron-rich magma
METAMORPHIC ROCKS - blue
http://www.boxrockcircus.org.uk
Crystalline climbing block Side 2
Basalt lava
cooled from ironrich magma
tiny crystals so
cooled quickly
Lava bomb
missing
Slate House
Slate from Ffestiniog,
Wales on this side
(see Side 1)
Lava bomb
molten lava flew
through the air and
cooled before it landed,
Ascension Island
Lava
(see Side 1)
Lava with gas
bubbles
Lava
Vesuvius
Granulite
(see Side 1)
Gneiss
high-grade
matamorphism
Elvan, type
of granite
with large
feldspars,
Devon and
Cornwall
Granodiorite
Serpentine
Lizard,
Cornwall
Granite pebble
Granite
large feldpars
(phenocrysts) in
portphyritic texture
showing two
stages of cooling
Granite
Rosa Beta
Sardinia
Pumice
frothy lava
Crystalline climbing block Side 3
Granodiorite
Giallo
Veneziano,
Brazil
3 stages of cooling Granite
large crystals from silica-rich magma
Microgranite
medium crystals from silica-rich magma
Basalt lava
tiny srystals from iron-rich magma
IGNEOUS ROCKS - black
Lava bomb
(missing)
Shap granite
large feldspars
(pheocrysts) in
porphyritic texture
showing two
stages of cooling
Gneiss/
Granulite
(see Side 1)
Larvikite
(Syenite)
iridescent
feldspar
crystals
Emerald Pearl
Norway
Marble
metamorphosed
limestone
Gneiss
high grade
metamorphism
Gneiss/
Granulite
Gneiss
Verde Aurora
Australia
Anorthosite
(see Side 1)
Granite - Rosso Balmoral,
Finland. Black mark is a
Xenolith where some of the
surrounding rock was
incorporated into the
magma as it pushed its
way in. The quarrymen
used to call them 'heathens'.
Slate House
Middle roof slate is from Ffestiniog, the
rest are Penrhyn, all from Wales
(see Side 1)
Granite
(see Side 1)
Marble
metamorphosed
limestone
Gneiss
Gneiss
Paradiso Bash Blu Barracuda
India
Brazil with
red garnets
METAMORPHIC ROCKS - blue
http://www.boxrockcircus.org.uk
Metamorphosed conglomerate
assortment of pebbles elongated
and altered by tremendous
pressure and heat.
Nero Marinaci, Brazil
Gneiss/
Granulite
high grade
metamorphism
red crystals are
garnets
Verde Laguna
Turkey