This round wooden (I think) thing I found washed up on the beach. The top and bottom pieces slope towards the middle and there are 4 holes around the side that are
Prograding Delta Deposits – Emily Zawacki, Ph.D.
Public health and preventive medicine. brick, and slope outwards from the base. They are usuallylined on the inner face by a layer of puddle clay. The bottom is of concreteor puddle
Pedestrian Curb Ramps | Highway Knowledge Portal
Scree - Wikipedia
A treatise on highway construction . rains atthe foot of the side slopes. In others a narrow trench has beenexcavated, parallel to the axis of the road, from the top surface toa