Igneous Rock

 

Other common names

 

Date collected, locality of origin
(attach a description, sketch,
or photograph of surroundings)

 

Shade and Colors

__ Light
__ Intermediate
__ Dark

Pattern, colors or tints:

 

 

 

Texture

__ Phaneritic (coarse-grained)
__ Pegmatic
__ Porphyritic
__ Aphanitic (fine-grained)
__ Glassy

Notes, incl. crystals visible with unaided eye:

 

 

 

Composition

__ Ultramafic
__ Mafic
__ Intermediate
__ Felsic

Classification

__ Volcanic (extrusive)
__ Plutonic (intrusive)

Other observations

 

Crystals visible with magnifying glass:

 

 

Remarks, uses

 

 

 

 

Igneous Rock

 

Other common names

 

Date collected, locality of origin
(attach a description, sketch,
or photograph of surroundings)

 

Shade and Colors

__ Light
__ Intermediate
__ Dark

Pattern, colors or tints:

 

 

 

Texture

__ Phaneritic (coarse-grained)
__ Pegmatic
__ Porphyritic
__ Aphanitic (fine-grained)
__ Glassy

Notes, incl. crystals visible with unaided eye:

 

 

 

Composition

__ Ultramafic
__ Mafic
__ Intermediate
__ Felsic

Classification

__ Volcanic (extrusive)
__ Plutonic (intrusive)

Other observations

 

Crystals visible with magnifying glass:

 

 

Remarks, uses