The logical fallacy of exaggeration / stretching the truth / overstatement occurs when a point is made by saying something that would be true, but the truth has been distorted in some way.
Bill Nye, debating against Creation Science at the Creation Museum: "Snow ice forms over the winter as snowflakes fall and are crushed down by subsequent layers, they’re crushed together, entrapping the little bubbles, and the little bubbles must needs be the ancient atmosphere. There’s nobody running around with a hypodermic needle, you know, squirting ancient atmosphere into the bubbles, and we find certain of these cylinders to have 680,000 layers."