A ORIXE DAS ROCHAS

http://www.librosvivos.net/smtc/homeTC.asp?TemaClave=1059


http://www.ceibal.edu.uy/UserFiles/P0001/ODEA/ORIGINAL/090824_rocas1.elp/qu_son_las_rocas.html

http://www.ceibal.edu.uy/UserFiles/P0001/ODEA/ORIGINAL/100222_rocas_sedimentarias1.elp/

http://www.ceibal.edu.uy/UserFiles/P0001/ODEA/ORIGINAL/100317_sedimentarias2.elp/