Help identifying a rock type

[kauaihiker]

Greetings! I saw these boulders at the Alabama gulf shore and wondered if someone could tell me what type of rock composes these boulders? I've browsed through a number of rock identification sites and cannot find a match. Best I got is that they might be gneiss but it doesn't look "grainy" enough. Pictures attached. Many thanks!

Kauaihiker

 

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[Moesia]

Chert (grey part), Basalt dyke (black stuff).
You can always just look at the local geology map for these types of rock.