Passage II
A lahar is a flow of water-saturated volcanic ash and rock. A lahar deposit, formed once the flow stops, consists of clasts (rocks having diameters ≥ 16 mm) embedded in a matrix (a mixture of particles having diameters ≤ 8 mm).
A sample of a lahar deposit was collected at each of 7 distances from a volcano's crater. For each sample, Figure 1 shows the percent by mass of the clasts by composition, and Figure 2 shows the percent by mass of the matrix by particle size class. For the 7 samples combined, Figure 3 shows the cumulative percent by mass of clasts and matrix particles, or of clasts alone, as diameter decreases.
6. According to Figure 2, as the distance from the volcano's crater increased, the percent by mass of silt- and clay-size particles in the matrix of the samples:
Your Answer is
Correct Answer is G
Explanation
Look at figure 2, as the distance increases, the percentage of silt and clay becomes less and less, so it is decreased only