Now, see my post at the top.You'll see the Goldwyer formation...

Now, see my post at the top.

You'll see the Goldwyer formation has 4 units.

Unit 4 is at the top. It supposed to be little prospective. (mid grey). With low TOC levels. 9Total organic carbon)

Then comes Unit 3. Similar to Unit 4.

Uni2 is second form the bottom, with highn TOC dark grey.

Unit 1 is at the bottom. with very hign TOC and black colour.

Now, we have encountered the dark grey and black shales at the unit 4 and unit 3 levels which are considered as upper level of Goldwyer.

So the result is perfect for now.