code: def get_degree_cols(df):
      
      vals = ['lon_w', 'lon_e', 'lat_lon_precision', 'pole_lon',
              'paleolon', 'paleolon_sigma',
              'lon', 'lon_sigma', 'vgp_lon', 'paleo_lon', 'paleo_lon_sigma',
              'azimuth', 'azimuth_dec_correction', 'dir_dec',
              'geographic_precision', 'bed_dip_direction']
      relevant_cols = list(set(vals).intersection(df.columns))
      return relevant_cols
docs: Take in a pandas DataFrame, and return a list of columns
      that are in that DataFrame AND should be between 0 - 360 degrees.