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5 votes
Which layers are impermeable ?

layer of loose soil

layer of sand

layer of gravel

layer of hard clay

solid rock
HELP ASAP!

2 Answers

4 votes
Layer of sand, layer of hard clay and layers of loose soil
User Ameenhere
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Impermeable and/or non-porous materials include clay, non-fractured igneous and metamorphic rocks. Porous/permeable layers are called aquifers; impermeable layers called aquiludes.

User ReVerse
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