Slate
Building or Place
NPS Code
Address
Number of Samples
Used for lab “Identification of Stone Hand Specimens”
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Connecticut bluestoneFine quartz sandstone. Note faint cross-stratification
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Black slate
Note lineation, minute flakes of white mica -
Connecticut bluewater stone
Fine quartz sandstone -
Quartzite flagstone
Quartz-mica schist. Note flattened grains -
Tan Arizona flagstone
Finely laminated -
Lava stone
Vesicular basalt. Are vesicles connected? -
Red Arizona flagstone
Fine quartz grains are coated with iron oxide -
Azure marble
Quartzite. Individual grains are discernible. Is it metamorphic? -
Pumice
Frothy glass. Note layering. Will it float? -
Granite
Gray feldspar, glassy quartz, dark pyroxene, interlocking grains -
Rose quartzite
Note lack of cleavage and lack of crystal faces -
White quartzite
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Yellow marble
Dolomitic. -
White dolomite
Is it dolomite or quartzite? -
Indiana limestone
Rich in microscopic fossils -
Wisconsin limestone
Rich in small fossils -
Italian brown marble
Is it actually a marble? Extensively recrystallized, but details of some small fossils are preserved. Crystalline limestone or metamarble. -
Texas yellow sandstone
Abundant microscopic fossils -
Stanford sandstone
Angular quartz grains, some feldspar grains -
Yellow Nario limestone
Microscopic fossils -
Black marble
Brecciated limestone, recemented fragments -
Pink and green granite
Little quartz, so not a true granite. Pink and green-gray feldspar, dark pyroxene -
Yellow marble
Not marble, but granite that is mostly feldspar with some quartz -
Dolomitc marble
Compare with #8, which has a similar appearance, but different acid reaction -
Basalt
Probably an andesite, with more silica than true basalt.
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