def plot_plate_limits_field(axis, rcmb, ridges, trenches):
for trench in trenches:<EOL><INDENT>xxd = (rcmb + <NUM_LIT>) * np.cos(trench)  <EOL>yyd = (rcmb + <NUM_LIT>) * np.sin(trench)  <EOL>xxt = (rcmb + <NUM_LIT>) * np.cos(trench)  <EOL>yyt = (rcmb + <NUM_LIT>) * np.sin(trench)  <EOL>axis.annotate('<STR_LIT>', xy=(xxd, yyd), xytext=(xxt, yyt),<EOL>arrowprops=dict(facecolor='<STR_LIT>', shrink=<NUM_LIT>))<EOL><DEDENT>for ridge in ridges:<EOL><INDENT>xxd = (rcmb + <NUM_LIT>) * np.cos(ridge)<EOL>yyd = (rcmb + <NUM_LIT>) * np.sin(ridge)<EOL>xxt = (rcmb + <NUM_LIT>) * np.cos(ridge)<EOL>yyt = (rcmb + <NUM_LIT>) * np.sin(ridge)<EOL>axis.annotate('<STR_LIT>', xy=(xxd, yyd), xytext=(xxt, yyt),<EOL>arrowprops=dict(facecolor='<STR_LIT>', shrink=<NUM_LIT>))<EOL><DEDENT>
plot arrows designating ridges and trenches in 2D field plots