Please help me identify soil type

[Mikey]

With recent rain, i started to dig out some dirt in my garden for a retaining wall.  The rain soften the soil but i cannot identify soil type.  It is not clay because it is very hard and sandy but it is not sand like the beach sand where everything turn into grains. 

[Linh]

It looks like decomposed granite

[dmwong93]

Maybe decomposed granite and some limestone