Yup, but I don't think it has been called the Marehan Sandstones since Kenya got independence; I wouldn't put past them to have requested the name change as I recall telling Ugaaska Barakaysan.
So the sandstones aren't one thing like Buur Hakaba.
Its a series from Garbahaarey to Wajiir. What we call "Buuraha" Garbahaarey are part of these sandstones.
Since the series were first identified they were called the Marehan sandstones until the 60's.
After the 60's , all of a sudden the part of the sandstones in Gedo Region and Somalia started to be called "Garba Harre" Formation and the part of the series in Kenya were simply called "Danissa" formations unlike originally Danissa Hills OF THE Marehan Sandstones.
I have looked everywhere for SCIENTIFIC explanation of the change of nomenclature...for example were they no longer a single series...and I have yet to find a single scientific answer.
The few that remark on it just say the forner name is the name of a tribe....which is remarkable considering many scientific names are derived through geographical, cultural or orher associations at the place of the naming item. It is not routine that a scientific name is changed in hindsight for being named after a tribe associated with it. There is nothing offensive involved in this issue.
So my suspicion is there was an EXTRAORDINARY political intervention which may have to do with issues surrounding land claims between states that informed both the interference and the concurrence with British influence heavily affecting the outcome.
So those are the Danissa Hills and the ones in Gedo are the Garba Harre Formations and both were originally the Marehan Sandstones
So it hasn't been called "Marehan Sandstone" in 60 years.