Card Sort 4 Card Sort 4
ROCK12345678
1) Adamellite133-1---
2) Andesite2-3--1--
3) Basalt31----2-
4) Dacite2-1--3--
5) Diorite-Tonalite2-2--2--
6) Dolerite32----2-
7) Dunite-Peridotite4--1---1
8) Gabbro33----1-
9) Granodiorite131-2---
10) Granite132-2---
11) Kentallenite2----?--
12) Microgranite112-2---
13) Peridotite4------2
14) Rhyolite111-3---
15) Nepheline-Syenite5-------
16) Trachyte113-2---

Sort 1 - Quartz level
1 - 10% quartz
2 - <10% quartz and >2/3 feldspar
3 - no essential quartz but includes feldspar and pyroxene (basic)
4 - NO quartz but ferromagnetism (ultrabasic)
5 - undersaturated in silica contains Nepheline (a feldsparthoid)

Sort 2 - grain size of basic rocks (sort 1,3)
1 - fine
2 - intermediate
3 - coarse

Sort 3 - division of feldspar in >10% quartz AND <10% quartz / >2/3 feldspar rocks (sort 1,2)
1 - feldspar is > 2/3 plagioclase AND < 1/3 orthoclase
2 - feldspar is between 1/3 and 2/3 of plagioclase and orthoclase
3 - feldspar is > 2/3 orthoclase AND < 1/3 plagioclase

Sort 4 - predominance of olivine in ultrabasic rocks (sort 1,4)
1 - predominant olivine

Sort 5 - types of white felsic colour in > 10% quartz rocks (sort 1,1)
1 - white felsic colour and large 2-3 cm crystals in pink sheet
2 - white felsic colour
3 - white felsic colour with grey (thick acidic lava quenched as glass)

Sort 6 - colours of feldspar in < 10% quartz & > 2/3 feldspar rocks(sort 1 and 2)
1 - mainly pink
2 - intermediate
3 - mainly white

Sort 7 - division of basic rocks (crystalline)
1 - crystalline/shiny
2 - matt appearance

Sort 8 - euhedral crystals in ultrabasic rocks
1 - has euhedral crystals
2 - no euhedral crustals