Q-1 Name the 3 principal basaltic magma that are generated from melting of the m
ID: 234682 • Letter: Q
Question
Q-1 Name the 3 principal basaltic magma that are generated from melting of the mantle?
Q-2 High degrees of fractionation in alkali basalts in a continental,intra-plate setting can give rise to which two highly potassic magma types?
Q-3 Describe a Sedimentary Structure that can be used to interpret the following "way up" of a sequence
Q-4 How do the characteristics of clastic sediments typically change with increasing distrance from their origin? Use Diagrams and include atleast two different depositional Envirnment to support your Answer.
Q-5 The partial melting of what type of Peridotite produces a basalt and a residual harzburgite?
Q-6 In a sedimentary rock what is signidicant about a preferred grain orientation and how does it form?
Q-7 What type of primary magma is only known from the Archean and why is not formed today?
Q-8 With the Aid of labelled Diagram and using Appropriate Terminology, Explain the differences between Laws of Stratiagraphy including Unconformities
Q-9 With the aid of a labelled diagram draw an idealised section through an ophiolite. Remember to label the four main rock types and define the areas of crust and mantle they represent.
Q-10 What is polymorph? Reference to Three Aluminosilicate metamorphic indicator minerals.
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Explanation / Answer
Tholeitic basalt, alkali basalt, olivine basalt
Tholeitic basalt are poor in sodium and silica and rich in magnesium and iron
Alkali basalt are rich in sodium , potassium and aluminium
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