<prompt> Ingxenye enkulu yesisekelo sechibi yakhiwe yi-marl.  <response>: Yiqiniso, inguqulo eyinkimbinkimbi yalesi sigwebo ithi Ingxenye enkulu yezansi kwechibi yakhiwe nge-marl; izingxenye ezijulile ikakhulu zakhiwe nge-pulpy peat. 