Naked Science Forum

Non Life Sciences => Geology, Palaeontology & Archaeology => Topic started by: Mariana on 14/02/2019 16:44:27

Title: Can you help me identify a rock?
Post by: Mariana on 14/02/2019 16:44:27
Lan wants to know:

Can you help me identify a rock?

We were staying in a hotel next to Udawalawe National Park in Sri Lanka and found lots of rocks that had specks of silvery metallic shiny pieces in them. The majority of the stones had highly shiny silvery specks while some had black specks that were larger but still glisten and catch the light so as to shine. Rocks were in general very dark in colour and very compact, although i think some were sedimentary, as I could see their layers and these layers split easily. Do you know what type of rocks these are?


Can you help figure out the answer?
Title: Re: Can you help me identify a rock?
Post by: Bass on 17/02/2019 23:31:23
Any possibility of a picture?
Title: Re: Can you help me identify a rock?
Post by: Bill S on 16/03/2019 21:21:53
  The flecks sound like muscovite and biotite mica, but as Bass says, a pic would be great.
Title: Re: Can you help me identify a rock?
Post by: flummoxed on 17/03/2019 16:55:15
Lan wants to know:

Can you help me identify a rock?

We were staying in a hotel next to Udawalawe National Park in Sri Lanka and found lots of rocks that had specks of silvery metallic shiny pieces in them. The majority of the stones had highly shiny silvery specks while some had black specks that were larger but still glisten and catch the light so as to shine. Rocks were in general very dark in colour and very compact, although i think some were sedimentary, as I could see their layers and these layers split easily. Do you know what type of rocks these are?


Can you help figure out the answer?

sounds like you are talking schist of the mica variety. A picture would be useful.