Plate Tectonics Lab Worksheet (Sections 2 and 3)

Plate Tectonics Lab Worksheet Data Table 2 COCOS-NAZCA PLATE White Anomaly Orange Anomaly Tan Anomaly Green Anomaly Ruler distance (cm) .6 cm .4 cm .4 cm 1 cm Distance across anomaly in km 150 km 130 km 130 km 250 km In centimeters (cm) 15,000,000 cm 13,000,000 cm 13,000,000 cm 25,000,000 cm Absolute Age (in years) 5,000,000 years 10,000,000 years 15,000,000 years 20,000,000 years Duration of Anomaly (in years) 5,000,000 years 5,000,000 years 5,000,000 years 5,000,000 years Average Sea Floor Spreading Half Rate 3.0 cm/year 2.0 cm/year 2.0 cm/year 8.0 cm/year PACIFIC-NAZCA PLATE White Anomaly Orange Anomaly Tan Anomaly Green Anomaly Ruler distance (cm) 1 cm 1 cm 1.5 cm 1.5 cm Distance across anomaly in km 370 km 250 km 375 km 375 km In centimeters (cm) 37,000,000 cm 25,000,000 cm 37,500,000 cm 37,500,000 cm Absolute Age (in years) 5,000,000 years 10,000,000 years 15,000,000 years 20,000,000 years Duration of Anomaly (in years) 5,000,000 years 5,000,000 years 5,000,000 years 5,000,000 years Average Sea Floor Spreading Half Rate 7.4 cm/year 8 cm/year 12 cm/year 12 cm/year