Identify one geologic event that occurred in new york state when mastodonts existed

When mastodons existed in the Pleistocene Epoch, there was an advance and retreat of the last continental ice in the landscape of New York. This changed a lot this landscape and was one of the most important geologic event.

Ultra-high temperature (uht)

Jenny and fred both play a long note on their trombones. a stationary observer hears the sound increasing and decreasing repeatedly in loudness. which of these must be true? the sound waves from the two trombones have slightly different frequencies.the sound waves from the two trombones have the same frequency.the sound waves from the two trombones have slightly different amplitudes.the sound waves from the two trombones have the same wavelength.the sound waves from the two trombones have slightly different velocities.  lolthe answer is          the sound waves from the two trombones have slightly different frequencies.