Rocks and Thin Sections



This webpage is inteded for use of students and researches who are interested in geology and  petrography

All images (in low res) are commented. Yet, if you are interested to get higher resolution pictures and/or labellled images (e.g., mineral labels in thin sections), you are welcome to contact me at:

 giulio.solferino(at)rhul.ac.uk

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cougar




 1.
 
 Thin sections of
 metamorphic
 rocks

sill

Sillimanite in metapelite PPL
sill

Sillimanite in metapelite XPL
sill

Sillimanite in metapelite PPL

sill

Sillimanite in metapelite XPL
epi-glf

Epidote and glaucophane in metabasite  PPL
epi-glf

Epidote and glaucophane in metabasite  XPL
glf

Epidote and glaucophane in metabasite PPL
glf

Epidote and glaucophane in metabasite XPL
rtl

Rutile (red) in greenschist rock
and

Andalusite (chiastolite) in contact metapelite  PPL
crd

Cordierite (sectorial extinction) in contact metapelite  XPL
str

Staurolite in metapellite PPL

 2.

 
 Thin sections of
  two-micas granite
bt-ms

Biotite and muscovite  PPL
bt-ms

Biotite and muscovite  XPL
myrmekite

Myrmekite (quartz intergrows in plagioclase)  XPL
granite

Microcline, muscovite, biotite, plagioclase, and quartz  XPL
microcline

Tartan twinning in k-feldspar (microcline)  XPL
qtz

Undulose extinction in quartz  XPL
chl

Chlorite replacing biotite  PPL
ms

Muscovite and biotite  PPL
ms

Muscovite and biotite  XPL

  3.

 
  Rum intrusion
chr

Chromite layer between anorthosithe and troctolite  PPL
chr

Chromite layer between anorthosithe and troctolite  XPL
anort

Anorthosithe with interstitial olivine  PPL
anort

Anorthosithe with interstitial olivine  XPL
troct

Troctolite: olivine with interstitial plagioclase  PPL
troct

Troctolite: olivine with interstitial plagioclase  XPL
anorth

Anorthosithe > 95% plagioclase  XPL
chr res

Resorption or overgrowth texture of chormite and plagioclase  XPL
 
  4.

 
  Igneous rocks
  miscellanea
nepheline

Nepheline in intrusive rock PPL
nephe

Nepheline in intrusive rock XPL
leucite

Leucite in extrusive rock PPL
leucite

Leucite in extrusive rock XPL
hbl

Horneblende in extrusive rock PPL
hbl

Horneblende in extrusive rock XPL
cpx

Clinopyroxene in basalt XPL
mix

Clinopyroxene replaced by horneblende that is overgrown by biotite PPL
mix

Clinopyroxene replaced by horneblende
that is overgrown by biotite XPL
hbl


Horneblende in granodiorite PPL
hbl


Horneblende in granodiorite XPL
myr


Myrmekite in granite XPL
plag

Zoned plagioclase in basalt PPL
plag

Zoned plagioclase in basalt PPL
 
  5.

 
  Kimberlites
serp

Serpentine-replaced olivine PPL
sr

Serpentine-replaced olivine XPL
phl

Phlogopite PPL
sr phl

Phlogopite and serpentine XPL
opx

Orthopyroxene replaced by talc XPL
olv

Serpentine replacing olivine, with kink bands XPL



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