<prompt> Translate the following text to SwahiliThe oldest rocks are 500 million-year-old slates found around the northern peak of Skiddaw, where the mountains have smooth and rounded profiles.  <response>: Miamba ya kale zaidi ni miamba ya mchanga yenye umri wa miaka milioni 500 iliyopatikana karibu na kilele cha kaskazini cha Skiddaw, ambapo milima ina miundo laini na ya mviringo. 