2006-08-20 08:49:23 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
I used to work in the field of core analysis where we tested the permeability and porosity of rocks. It is not a question of which rock type fits the above criteria is wether or not the above criteria can be found in one single rock type: it cant. The fundamental principals being what is permeability and what is porosity can only be determined by the mechanical structure and properties of the rock themselves, not to mention the fabric of the rock. Any rock under the right conditions can be low permeability and high porosity, so the question is erroneous.
The anwsers above are well, missing the mark somewhat. Yes Shale can exhibit low perm hi poro when it is undercompacted and where there is a volume of silt partical present or even sand particals present within the rock fabric, basalt is full of vugs so the actual porosity/ permability is thrown into question
2006-08-21 10:06:10 · answer #1 · answered by A_Geologist 5 · 0⤊ 1⤋
Shale Porosity And Permeability
2016-12-12 10:40:46 · answer #2 · answered by ? 4 · 0⤊ 0⤋
Shale is a good example of a high porosity/low perm rock.
There is a lot of pore space between the individual layers of clay minerals in a shale. But, none of this pore space is interconnected, thus giving poor perm.
2006-08-20 08:58:06 · answer #3 · answered by Flighy 2 · 2⤊ 1⤋
Shale has high porosity and very low permeability.
2006-08-20 12:47:01 · answer #4 · answered by idiot detector 6 · 2⤊ 0⤋
Vesicular basalt is one. The water could only exist in fractures and vesicles, not between grains (because there are none).
Some clays can be that way too.
2006-08-20 08:56:30 · answer #5 · answered by QFL 24-7 6 · 1⤊ 0⤋
Pumice
2006-08-20 08:56:16 · answer #6 · answered by notachia 2 · 1⤊ 0⤋
Shales, clays and basalts
2006-08-21 15:23:18 · answer #7 · answered by Amphibolite 7 · 1⤊ 0⤋