Some showed little erosion, suggesting they were geologically quite young.
He cites surveys that show erosion of trust in news groups.
Indeed, most of the top syndicated shows have shown significant erosion from the period a year earlier.
Recent public opinion polls have shown surprisingly little erosion in that support.
Two polls in December 2007 showed further erosion in Spitzer's public standing.
The most recent challenges to the state insurance regulatory system are arguably the most significant, as well, showing further erosion of state primacy.
They show erosion through all substrates, from unlithified sediment to crystalline rock.
This slide shows erosion from the eating disorder bulimia.
The new data also showed continuing erosion in the percentage of Americans covered by health insurance.
It showed similar erosion of regard for for-profit health plans, to 39 percent from 48 percent.
